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<span>Notation history</span> </div> </a> <button aria-controls="toc-Notation_history-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Notation history subsection</span> </button> <ul id="toc-Notation_history-sublist" class="vector-toc-list"> <li id="toc-Abbreviations" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Abbreviations"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Abbreviations</span> </div> </a> <ul id="toc-Abbreviations-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Unit_symbols" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Unit_symbols"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Unit symbols</span> </div> </a> <ul id="toc-Unit_symbols-sublist" class="vector-toc-list"> </ul> </li> <li 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</a> <ul id="toc-Conversions-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Kilometres per hour</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 58 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-58" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">58 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Kilometer_per_uur" title="Kilometer per uur – Afrikaans" lang="af" hreflang="af" data-title="Kilometer per uur" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%83%D9%8A%D9%84%D9%88%D9%85%D8%AA%D8%B1_%D9%81%D9%8A_%D8%A7%D9%84%D8%B3%D8%A7%D8%B9%D8%A9" title="كيلومتر في الساعة – Arabic" lang="ar" hreflang="ar" data-title="كيلومتر في الساعة" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Quil%C3%B3metru_per_hora" title="Quilómetru per hora – Asturian" lang="ast" hreflang="ast" data-title="Quilómetru per hora" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Km/s" title="Km/s – Azerbaijani" lang="az" hreflang="az" data-title="Km/s" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Kong-l%C3%AD_ta%CC%8Dk_ti%C3%A1m-cheng" title="Kong-lí ta̍k tiám-cheng – Minnan" lang="nan" hreflang="nan" data-title="Kong-lí ta̍k tiám-cheng" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9A%D1%96%D0%BB%D0%B0%D0%BC%D0%B5%D1%82%D1%80_%D1%83_%D0%B3%D0%B0%D0%B4%D0%B7%D1%96%D0%BD%D1%83" title="Кіламетр у гадзіну – Belarusian" lang="be" hreflang="be" data-title="Кіламетр у гадзіну" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9A%D0%B8%D0%BB%D0%BE%D0%BC%D0%B5%D1%82%D1%8A%D1%80_%D0%B2_%D1%87%D0%B0%D1%81" title="Километър в час – Bulgarian" lang="bg" hreflang="bg" data-title="Километър в час" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Kilometar_na_sat" title="Kilometar na sat – Bosnian" lang="bs" hreflang="bs" data-title="Kilometar na sat" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Quil%C3%B2metre_per_hora" title="Quilòmetre per hora – Catalan" lang="ca" hreflang="ca" data-title="Quilòmetre per hora" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Kilometr_za_hodinu" title="Kilometr za hodinu – Czech" lang="cs" hreflang="cs" data-title="Kilometr za hodinu" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Kilometer_pro_Stunde" title="Kilometer pro Stunde – German" lang="de" hreflang="de" data-title="Kilometer pro Stunde" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Kilomeeter_tunnis" title="Kilomeeter tunnis – Estonian" lang="et" hreflang="et" data-title="Kilomeeter tunnis" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A7%CE%B9%CE%BB%CE%B9%CF%8C%CE%BC%CE%B5%CF%84%CF%81%CE%B1_%CE%B1%CE%BD%CE%AC_%CF%8E%CF%81%CE%B1" title="Χιλιόμετρα ανά ώρα – Greek" lang="el" hreflang="el" data-title="Χιλιόμετρα ανά ώρα" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Kil%C3%B3metro_por_hora" title="Kilómetro por hora – Spanish" lang="es" hreflang="es" data-title="Kilómetro por hora" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Kilometro_en_horo" title="Kilometro en horo – Esperanto" lang="eo" hreflang="eo" data-title="Kilometro en horo" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Kilometro_orduko" title="Kilometro orduko – Basque" lang="eu" hreflang="eu" data-title="Kilometro orduko" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%A9%DB%8C%D9%84%D9%88%D9%85%D8%AA%D8%B1_%D8%A8%D8%B1_%D8%B3%D8%A7%D8%B9%D8%AA" title="کیلومتر بر ساعت – Persian" lang="fa" hreflang="fa" data-title="کیلومتر بر ساعت" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Kilom%C3%A8tre_par_heure" title="Kilomètre par heure – French" lang="fr" hreflang="fr" data-title="Kilomètre par heure" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Quil%C3%B3metro_por_hora" title="Quilómetro por hora – Galician" lang="gl" hreflang="gl" data-title="Quilómetro por hora" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%82%AC%EB%A1%9C%EB%AF%B8%ED%84%B0_%EB%A7%A4_%EC%8B%9C" title="킬로미터 매 시 – Korean" lang="ko" hreflang="ko" data-title="킬로미터 매 시" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%95%E0%A4%BF%E0%A4%B2%E0%A5%8B%E0%A4%AE%E0%A5%80%E0%A4%9F%E0%A4%B0_%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%A4%E0%A4%BF_%E0%A4%98%E0%A4%82%E0%A4%9F%E0%A4%BE" title="किलोमीटर प्रति घंटा – Hindi" lang="hi" hreflang="hi" data-title="किलोमीटर प्रति घंटा" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Kilometar_na_sat" title="Kilometar na sat – Croatian" lang="hr" hreflang="hr" data-title="Kilometar na sat" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kilometer_per_jam" title="Kilometer per jam – Indonesian" lang="id" hreflang="id" data-title="Kilometer per jam" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Chilometro_orario" title="Chilometro orario – Italian" lang="it" hreflang="it" data-title="Chilometro orario" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A7%D7%99%D7%9C%D7%95%D7%9E%D7%98%D7%A8_%D7%9C%D7%A9%D7%A2%D7%94" title="קילומטר לשעה – Hebrew" lang="he" hreflang="he" data-title="קילומטר לשעה" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%99%E1%83%98%E1%83%9A%E1%83%9D%E1%83%9B%E1%83%94%E1%83%A2%E1%83%A0%E1%83%98_%E1%83%A1%E1%83%90%E1%83%90%E1%83%97%E1%83%A8%E1%83%98" title="კილომეტრი საათში – Georgian" lang="ka" hreflang="ka" data-title="კილომეტრი საათში" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Kilomita_kwa_saa" title="Kilomita kwa saa – Swahili" lang="sw" hreflang="sw" data-title="Kilomita kwa saa" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Kilometri_stund%C4%81" title="Kilometri stundā – Latvian" lang="lv" hreflang="lv" data-title="Kilometri stundā" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9A%D0%B8%D0%BB%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8_%D0%BD%D0%B0_%D1%87%D0%B0%D1%81" title="Километри на час – Macedonian" lang="mk" hreflang="mk" data-title="Километри на час" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Kilometer_sejam" title="Kilometer sejam – Malay" lang="ms" hreflang="ms" data-title="Kilometer sejam" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/Kilometer_par_jam" title="Kilometer par jam – Minangkabau" lang="min" hreflang="min" data-title="Kilometer par jam" data-language-autonym="Minangkabau" data-language-local-name="Minangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Kilometer_per_uur" title="Kilometer per uur – Dutch" lang="nl" hreflang="nl" data-title="Kilometer per uur" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%AD%E3%83%AD%E3%83%A1%E3%83%BC%E3%83%88%E3%83%AB%E6%AF%8E%E6%99%82" title="キロメートル毎時 – Japanese" lang="ja" hreflang="ja" data-title="キロメートル毎時" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Kilometer_per_time" title="Kilometer per time – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Kilometer per time" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Kilometer_per_time" title="Kilometer per time – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Kilometer per time" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%95%E0%A8%BF%E0%A8%B2%E0%A9%8B%E0%A8%AE%E0%A9%80%E0%A8%9F%E0%A8%B0_%E0%A8%AA%E0%A9%8D%E0%A8%B0%E0%A8%A4%E0%A9%80_%E0%A8%98%E0%A9%B0%E0%A8%9F%E0%A8%BE" title="ਕਿਲੋਮੀਟਰ ਪ੍ਰਤੀ ਘੰਟਾ – Punjabi" lang="pa" hreflang="pa" data-title="ਕਿਲੋਮੀਟਰ ਪ੍ਰਤੀ ਘੰਟਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Kilometr_na_godzin%C4%99" title="Kilometr na godzinę – Polish" lang="pl" hreflang="pl" data-title="Kilometr na godzinę" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Quil%C3%B4metro_por_hora" title="Quilômetro por hora – Portuguese" lang="pt" hreflang="pt" data-title="Quilômetro por hora" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Kilometru_pe_or%C4%83" title="Kilometru pe oră – Romanian" lang="ro" hreflang="ro" data-title="Kilometru pe oră" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9A%D0%B8%D0%BB%D0%BE%D0%BC%D0%B5%D1%82%D1%80_%D0%B2_%D1%87%D0%B0%D1%81" title="Километр в час – Russian" lang="ru" hreflang="ru" data-title="Километр в час" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Kilomet%C3%ABr_p%C3%ABr_or%C3%AB" title="Kilometër për orë – Albanian" lang="sq" hreflang="sq" data-title="Kilometër për orë" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Chil%C3%B2mitru_orariu" title="Chilòmitru orariu – Sicilian" lang="scn" hreflang="scn" data-title="Chilòmitru orariu" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Kilometres_per_hour" title="Kilometres per hour – Simple English" lang="en-simple" hreflang="en-simple" data-title="Kilometres per hour" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Kilometer_za_hodinu" title="Kilometer za hodinu – Slovak" lang="sk" hreflang="sk" data-title="Kilometer za hodinu" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Kilometer_na_uro" title="Kilometer na uro – Slovenian" lang="sl" hreflang="sl" data-title="Kilometer na uro" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9A%D0%B8%D0%BB%D0%BE%D0%BC%D0%B5%D1%82%D0%B0%D1%80_%D0%BD%D0%B0_%D1%87%D0%B0%D1%81" title="Километар на час – Serbian" lang="sr" hreflang="sr" data-title="Километар на час" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Kilometar_na_sat" title="Kilometar na sat – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Kilometar na sat" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kilometri_tunnissa" title="Kilometri tunnissa – Finnish" lang="fi" hreflang="fi" data-title="Kilometri tunnissa" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Kilometer_per_timme" title="Kilometer per timme – Swedish" lang="sv" hreflang="sv" data-title="Kilometer per timme" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B4%E0%B9%82%E0%B8%A5%E0%B9%80%E0%B8%A1%E0%B8%95%E0%B8%A3%E0%B8%95%E0%B9%88%E0%B8%AD%E0%B8%8A%E0%B8%B1%E0%B9%88%E0%B8%A7%E0%B9%82%E0%B8%A1%E0%B8%87" title="กิโลเมตรต่อชั่วโมง – Thai" lang="th" hreflang="th" data-title="กิโลเมตรต่อชั่วโมง" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Kilometre_b%C3%B6l%C3%BC_saat" title="Kilometre bölü saat – Turkish" lang="tr" hreflang="tr" data-title="Kilometre bölü saat" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9A%D1%96%D0%BB%D0%BE%D0%BC%D0%B5%D1%82%D1%80_%D0%B7%D0%B0_%D0%B3%D0%BE%D0%B4%D0%B8%D0%BD%D1%83" title="Кілометр за годину – Ukrainian" lang="uk" hreflang="uk" data-title="Кілометр за годину" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%DA%A9%D9%84%D9%88%D9%85%DB%8C%D9%B9%D8%B1_%D9%81%DB%8C_%DA%AF%DA%BE%D9%86%D9%B9%DB%81" title="کلومیٹر فی گھنٹہ – Urdu" lang="ur" hreflang="ur" data-title="کلومیٹر فی گھنٹہ" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Kil%C3%B4m%C3%A9t_tr%C3%AAn_gi%E1%BB%9D" title="Kilômét trên giờ – Vietnamese" lang="vi" hreflang="vi" data-title="Kilômét trên giờ" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/Kilomete_a_l%27_eure" title="Kilomete a l' eure – Walloon" lang="wa" hreflang="wa" data-title="Kilomete a l' eure" data-language-autonym="Walon" data-language-local-name="Walloon" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%8D%83%E7%B1%B3%E6%AF%8F%E5%B0%8F%E6%97%B6" title="千米每小时 – Wu" lang="wuu" hreflang="wuu" data-title="千米每小时" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%85%AC%E9%87%8C%E6%AF%8F%E5%B0%8F%E6%99%82" title="公里每小時 – Cantonese" lang="yue" hreflang="yue" data-title="公里每小時" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link 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For the Canadian television sitcom, see <a href="/wiki/Km/h_(TV_series)" title="Km/h (TV series)">km/h (TV series)</a>.</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox ib-unit"><tbody><tr><th colspan="2" class="infobox-above">kilometre per hour</th></tr><tr><td colspan="2" class="infobox-image notheme" style="background-color: #f8f9fa;"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Metric_speedometer_from_a_1992_Euro-spec_Passat_B3.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Metric_speedometer_from_a_1992_Euro-spec_Passat_B3.jpg/220px-Metric_speedometer_from_a_1992_Euro-spec_Passat_B3.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Metric_speedometer_from_a_1992_Euro-spec_Passat_B3.jpg/330px-Metric_speedometer_from_a_1992_Euro-spec_Passat_B3.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Metric_speedometer_from_a_1992_Euro-spec_Passat_B3.jpg/440px-Metric_speedometer_from_a_1992_Euro-spec_Passat_B3.jpg 2x" data-file-width="1280" data-file-height="960" /></a></span><div class="infobox-caption">A car <a href="/wiki/Speedometer" title="Speedometer">speedometer</a> that indicates measured speed in kilometres per hour.</div></td></tr><tr><th colspan="2" class="infobox-header">General information</th></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/System_of_units_of_measurement" title="System of units of measurement">Unit system</a></th><td class="infobox-data">derived</td></tr><tr><th scope="row" class="infobox-label">Unit of</th><td class="infobox-data"><a href="/wiki/Speed" title="Speed">speed</a></td></tr><tr><th scope="row" class="infobox-label">Symbol</th><td class="infobox-data">km/h</td></tr><tr><th colspan="2" class="infobox-header">Conversions </th></tr><tr class="nowrap"><td>1 km/h <i>in ...</i></td><td><i>... is equal to ...</i></td></tr><tr style="display:none"><th colspan="2"> </th></tr><tr><th scope="row" class="infobox-label"><span class="nowrap">   </span><a href="/wiki/Miles_per_hour" title="Miles per hour">mph</a></th><td class="infobox-data"><span class="nowrap">   </span>0.621371</td></tr><tr><th scope="row" class="infobox-label"><span class="nowrap">   </span><a href="/wiki/Metre_per_second" title="Metre per second">m/s</a></th><td class="infobox-data"><span class="nowrap">   </span>0.277778</td></tr><tr><th scope="row" class="infobox-label"><span class="nowrap">   </span><a href="/wiki/Knot_(unit)" title="Knot (unit)">kn</a></th><td class="infobox-data"><span class="nowrap">   </span>0.539957</td></tr><tr><th scope="row" class="infobox-label"><span class="nowrap">   </span><a href="/wiki/Foot_per_second" title="Foot per second">ft/s</a></th><td class="infobox-data"><span class="nowrap">   </span>0.911344</td></tr></tbody></table><style data-mw-deduplicate="TemplateStyles:r1236303919">@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-has-images-with-white-backgrounds img{background:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-has-images-with-white-backgrounds img{background:white}}</style> <p>The <b>kilometre per hour</b> (<a href="/wiki/International_System_of_Units" title="International System of Units">SI</a> symbol: <b>km/h</b>; non-SI abbreviations: <b>kph</b>, <b>km/hr</b>) is a <a href="/wiki/Units_of_measurement" class="mw-redirect" title="Units of measurement">unit</a> of <a href="/wiki/Speed" title="Speed">speed</a>, expressing the number of <a href="/wiki/Kilometre" title="Kilometre">kilometres</a> travelled in one <a href="/wiki/Hour" title="Hour">hour</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Although the metre was formally defined in 1799, the term "kilometres per hour" did not come into immediate use – the myriametre (<span class="nowrap">10,000 metres</span>) and myriametre per hour were preferred to kilometres and kilometres per hour. In 1802 the term "<i>myriamètres par heure</i>" appeared in French literature.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The Dutch on the other hand adopted the kilometre in 1817 but gave it the local name of the <i>mijl</i> (<a href="/wiki/Mile#Other_historical_miles" title="Mile">Dutch mile</a>).<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Notation_history">Notation history</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=2" title="Edit section: Notation history"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Sign-1040119,_Leixlip,_Co._Kildare,_Ireland.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Sign-1040119%2C_Leixlip%2C_Co._Kildare%2C_Ireland.jpg/220px-Sign-1040119%2C_Leixlip%2C_Co._Kildare%2C_Ireland.jpg" decoding="async" width="220" height="327" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Sign-1040119%2C_Leixlip%2C_Co._Kildare%2C_Ireland.jpg/330px-Sign-1040119%2C_Leixlip%2C_Co._Kildare%2C_Ireland.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Sign-1040119%2C_Leixlip%2C_Co._Kildare%2C_Ireland.jpg/440px-Sign-1040119%2C_Leixlip%2C_Co._Kildare%2C_Ireland.jpg 2x" data-file-width="950" data-file-height="1411" /></a><figcaption>Speed limit sign in the <a href="/wiki/Republic_of_Ireland" title="Republic of Ireland">Republic of Ireland</a>, using "km/h."</figcaption></figure> <p>The SI representations, classified as symbols, are "km/h", "<span class="nowrap">km h<sup>−1</sup></span>" and "<span class="nowrap">km·h<sup>−1</sup></span>". Several other abbreviations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "kph",<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-collins_5-0" class="reference"><a href="#cite_note-collins-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> "kmph" and "km/hr"<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> as English abbreviations. While these forms remain widely used, the International Bureau of Weights and Measures uses "km/h" in describing the definition and use of the International System of Units.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The entries for "kph" and "kmph" in the <i><a href="/wiki/Oxford_Advanced_Learner%27s_Dictionary" title="Oxford Advanced Learner's Dictionary">Oxford Advanced Learner's Dictionary</a></i> state that "the correct scientific unit is km/h and this is the generally preferred form".<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Abbreviations">Abbreviations</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=3" title="Edit section: Abbreviations"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Abbreviations for "kilometres per hour" did not appear in the English language until the late nineteenth century. </p><p>The <a href="/wiki/Kilometre" title="Kilometre">kilometre</a>, a unit of <a href="/wiki/Length" title="Length">length</a>, first appeared in English in 1810,<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> and the compound unit of <a href="/wiki/Speed" title="Speed">speed</a> "kilometers per hour" was in use in the US by 1866.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> "Kilometres per hour" did not begin to be abbreviated in print until many years later, with several different abbreviations existing near-contemporaneously. </p> <table> <tbody><tr> <td style="vertical-align:top; width:200pt;"> <ul><li>1889: "k. p. h."<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></li> <li>1895: "km:h"<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></li> <li>1898: "km/h"<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li> <li>1899: "km./hr."<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup></li> <li>1900: "kms./hr."<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup></li> <li>1902: "k.m.p.h."<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup></li> <li>1903: "KMph."<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup></li></ul> </td> <td style="vertical-align:top; width:200pt;"> <ul><li>1910: "km ph"<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup></li> <li>1911: "K.P.H."<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup></li> <li>1914: "km. hr."<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup></li> <li>1915: "km/hour"<sup id="cite_ref-Automobile1915_21-0" class="reference"><a href="#cite_note-Automobile1915-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup></li> <li>1915: "km.-hr."<sup id="cite_ref-Automobile1915_21-1" class="reference"><a href="#cite_note-Automobile1915-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup></li> <li>1916: "km. per hour"<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup></li> <li>1921: "kms/hr."<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup></li></ul> </td> <td style="vertical-align:top; width:200pt;"> <ul><li>1922: "Kmph"<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup></li> <li>1927: "kmph."<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup></li> <li>1933: "KPH"<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup></li> <li>1939: "kmph"<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup></li> <li>1940: "KMPH"<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup></li></ul> </td></tr></tbody></table> <p>With no central authority to dictate the rules for abbreviations, various publishing houses and standards bodies have their own rules that dictate whether to use upper-case letters, lower-case letters, periods and so on, reflecting both changes in fashion and the image of the publishing house concerned,<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> In contrast to the "symbols" designated for use with the SI system, news organisations such as <a href="/wiki/Reuters" title="Reuters">Reuters</a><sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> and <i><a href="/wiki/The_Economist" title="The Economist">The Economist</a></i><sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> require "kph". </p><p>In informal Australian usage, km/h is more commonly pronounced "kays" or "kays an hour".<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (May 2024)">citation needed</span></a></i>]</sup> In military usage, "klicks" is used, though written as km/h.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Unit_symbols">Unit symbols</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=4" title="Edit section: Unit symbols"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In 1879, four years after the signing of the <a href="/wiki/Metre_Convention" title="Metre Convention">Treaty of the Metre</a>, the <a href="/wiki/International_Committee_for_Weights_and_Measures" class="mw-redirect" title="International Committee for Weights and Measures">International Committee for Weights and Measures</a> (CIPM) proposed a range of symbols for the various metric units then under the auspices of the <a href="/wiki/General_Conference_on_Weights_and_Measures" title="General Conference on Weights and Measures">General Conference on Weights and Measures</a> (CGPM). Among these were the use of the symbol "km" for "kilometre".<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> </p><p>In 1948, as part of its preparatory work for the <a href="/wiki/SI" class="mw-redirect" title="SI">SI</a>, the CGPM adopted symbols for many units of measure that did not have universally agreed symbols, one of which was the symbol "h" for "hours". At the same time the CGPM formalised the rules for combining units –  quotients could be written in one of three formats resulting in <span class="nowrap">"km/h"</span>, <span class="nowrap">"km h<sup>−1</sup>"</span> and <span class="nowrap">"km·h<sup>−1</sup>"</span> being valid representations of "kilometres per hour".<sup id="cite_ref-SI_34-0" class="reference"><a href="#cite_note-SI-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> The SI standards, which were <a href="/wiki/MKS_system_of_units" class="mw-redirect" title="MKS system of units">MKS-based</a> rather than <a href="/wiki/CGS" class="mw-redirect" title="CGS">CGS-based</a>, were published in 1960 and have since then have been adopted by many authorities around the globe including academic publishers and legal authorities. </p><p>The SI explicitly states that unit symbols are not abbreviations and are to be written using a very specific set of rules.<sup id="cite_ref-SI_34-1" class="reference"><a href="#cite_note-SI-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> M. Danloux-Dumesnils<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> provides the following justification for this distinction: </p> <style data-mw-deduplicate="TemplateStyles:r1244412712">.mw-parser-output .templatequote{overflow:hidden;margin:1em 0;padding:0 32px}.mw-parser-output .templatequotecite{line-height:1.5em;text-align:left;margin-top:0}@media(min-width:500px){.mw-parser-output .templatequotecite{padding-left:1.6em}}</style><blockquote class="templatequote"><p>It has already been stated that, according to Maxwell, when we write down the result of a measurement, the numerical value multiplies the unit. Hence the name of the unit can be replaced by a kind of algebraic symbol, which is shorter and easier to use in formulae. This symbol is not merely an abbreviation but a symbol which, like chemical symbols, must be used in a precise and prescribed manner.</p></blockquote> <p>SI, and hence the use of <span class="nowrap">"km/h"</span> (or <span class="nowrap">"km h<sup>−1</sup>"</span> or <span class="nowrap">"km·h<sup>−1</sup>"</span>) has now been adopted around the world in many areas related to health and safety<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> and in <a href="/wiki/Metrology" title="Metrology">metrology</a><sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> in addition to the SI unit <a href="/wiki/Metres_per_second" class="mw-redirect" title="Metres per second">metres per second</a> (<span class="nowrap">"m/s"</span>, <span class="nowrap">"m s<sup>−1</sup>"</span> or <span class="nowrap">"m·s<sup>−1</sup>"</span>). SI is also the preferred system of measure in academia and in education.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Non-SI_abbreviations_in_official_use">Non-SI abbreviations in official use</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=5" title="Edit section: Non-SI abbreviations in official use"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><b>km/j</b> or <b>km/jam</b> (Indonesia and Malaysia)</li> <li><b>km/t</b> or <b>km/tim</b> (Norway, Denmark and Sweden; also use <b>km/h</b>)</li> <li><b>kmph</b> (Sri Lanka and India)</li> <li><b>กม./ชม.</b> (Thailand; also uses <b>km/hr</b>)</li> <li><b>كم/س</b> or <b>كم/ساعة</b> (<a href="/wiki/Arabic-speaking_countries" class="mw-redirect" title="Arabic-speaking countries">Arabic-speaking countries</a>, also use <b>km/h</b>)</li> <li><b>קמ"ש</b> (Israel)</li> <li><b>км/ч</b> (Russia and Belarus in a Russian-language context)</li> <li><b>км/г</b> (Belarus in a Belarusian-language context)</li> <li><b>км/год</b> (Ukraine)</li> <li><b>km/st</b> (Azerbaijan)</li> <li><b>km/godz</b> (Poland)</li></ul> <div class="mw-heading mw-heading2"><h2 id="Regulatory_use">Regulatory use</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=6" title="Edit section: Regulatory use"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:World_Map_of_Speed_Limit_Units_on_Traffic_Signs.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/World_Map_of_Speed_Limit_Units_on_Traffic_Signs.svg/220px-World_Map_of_Speed_Limit_Units_on_Traffic_Signs.svg.png" decoding="async" width="220" height="112" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/32/World_Map_of_Speed_Limit_Units_on_Traffic_Signs.svg/330px-World_Map_of_Speed_Limit_Units_on_Traffic_Signs.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/32/World_Map_of_Speed_Limit_Units_on_Traffic_Signs.svg/440px-World_Map_of_Speed_Limit_Units_on_Traffic_Signs.svg.png 2x" data-file-width="2754" data-file-height="1398" /></a><figcaption><a href="/wiki/Speed_limit" title="Speed limit">Speed limit</a> units on <a href="/wiki/Traffic_sign" title="Traffic sign">traffic signs</a> around the world: <style data-mw-deduplicate="TemplateStyles:r981673959">.mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}</style><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#005ce6; color:white;"> </span> Kilometres per hour (km/h)</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff8000; color:black;"> </span> Miles per hour (mph)</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#22b14c; color:black;"> </span> Both</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#c0c0c0; color:black;"> </span> none known</div> </figcaption></figure> <p>During the early years of the motor car, each country developed its own system of road signs. In 1968 the <a href="/wiki/Vienna_Convention_on_Road_Signs_and_Signals" title="Vienna Convention on Road Signs and Signals">Vienna Convention on Road Signs and Signals</a> was drawn up under the auspices of the <a href="/wiki/United_Nations_Economic_and_Social_Council" title="United Nations Economic and Social Council">United Nations Economic and Social Council</a> to harmonise road signs across the world. Many countries have since signed the convention and adopted its proposals. Speed limits signs that are either directly authorised by the convention or have been influenced by the convention are shown below: </p> <ul class="gallery mw-gallery-traditional" style="max-width: 978px;"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Hungary_road_sign_C-033-100.svg" class="mw-file-description" title="100 km/h sign following the most common implementation of the Vienna Convention style (Hungary)"><img alt="100 km/h sign following the most common implementation of the Vienna Convention style (Hungary)" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Hungary_road_sign_C-033-100.svg/120px-Hungary_road_sign_C-033-100.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Hungary_road_sign_C-033-100.svg/180px-Hungary_road_sign_C-033-100.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/78/Hungary_road_sign_C-033-100.svg/240px-Hungary_road_sign_C-033-100.svg.png 2x" data-file-width="800" data-file-height="800" /></a></span></div> <div class="gallerytext">100 km/h sign following the most common implementation of the Vienna Convention style (Hungary)</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Sweden_road_sign_C31-3.svg" class="mw-file-description" title="Swedish 30 km/h speed limit – the yellow background provides a contrast in case snow covers the background against which one perceives the road sign.[39]"><img alt="Swedish 30 km/h speed limit – the yellow background provides a contrast in case snow covers the background against which one perceives the road sign.[39]" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Sweden_road_sign_C31-3.svg/120px-Sweden_road_sign_C31-3.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Sweden_road_sign_C31-3.svg/180px-Sweden_road_sign_C31-3.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Sweden_road_sign_C31-3.svg/240px-Sweden_road_sign_C31-3.svg.png 2x" data-file-width="1000" data-file-height="1000" /></a></span></div> <div class="gallerytext">Swedish 30 km/h speed limit – the yellow background provides a contrast in case snow covers the background against which one perceives the road sign.<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:IE_road_sign_RUS-043.svg" class="mw-file-description" title="Since the text "km/h" on this Irish speed limit sign is a symbol, not an abbreviation, it represents both "kilometres per hour" (English) and "ciliméadar san uair" (Irish)[40]"><img alt="Since the text "km/h" on this Irish speed limit sign is a symbol, not an abbreviation, it represents both "kilometres per hour" (English) and "ciliméadar san uair" (Irish)[40]" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/IE_road_sign_RUS-043.svg/120px-IE_road_sign_RUS-043.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/IE_road_sign_RUS-043.svg/180px-IE_road_sign_RUS-043.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/IE_road_sign_RUS-043.svg/240px-IE_road_sign_RUS-043.svg.png 2x" data-file-width="602" data-file-height="602" /></a></span></div> <div class="gallerytext">Since the text "km/h" on this Irish speed limit sign is a symbol, not an abbreviation, it represents both "kilometres per hour" (English) and "<span title="Irish-language text"><i lang="ga">ciliméadar san uair</i></span>" (<a href="/wiki/Irish_language" title="Irish language">Irish</a>)<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:UAE_Speed_Limit_-_60_kmh.svg" class="mw-file-description" title="60 km/h speed limit in Arabic numerals (below) and Arabic script (above) (UAE)"><img alt="60 km/h speed limit in Arabic numerals (below) and Arabic script (above) (UAE)" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/UAE_Speed_Limit_-_60_kmh.svg/120px-UAE_Speed_Limit_-_60_kmh.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/UAE_Speed_Limit_-_60_kmh.svg/180px-UAE_Speed_Limit_-_60_kmh.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4c/UAE_Speed_Limit_-_60_kmh.svg/240px-UAE_Speed_Limit_-_60_kmh.svg.png 2x" data-file-width="341" data-file-height="341" /></a></span></div> <div class="gallerytext">60 km/h speed limit in <a href="/wiki/Arabic_numerals" title="Arabic numerals">Arabic numerals</a> (below) and Arabic script (above) (<a href="/wiki/United_Arab_Emirates" title="United Arab Emirates">UAE</a>)</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Vesiliikennemerkki_11.svg" class="mw-file-description" title="Waterways speed limit of 9 km/h (Finland)"><img alt="Waterways speed limit of 9 km/h (Finland)" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Vesiliikennemerkki_11.svg/120px-Vesiliikennemerkki_11.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/03/Vesiliikennemerkki_11.svg/180px-Vesiliikennemerkki_11.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/03/Vesiliikennemerkki_11.svg/240px-Vesiliikennemerkki_11.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></div> <div class="gallerytext">Waterways speed limit of 9 km/h (<a href="/wiki/Finland" title="Finland">Finland</a>)</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Samoa_-_Speed_Limit.svg" class="mw-file-description" title="Samoa uses both miles per hour and kilometres per hour"><img alt="Samoa uses both miles per hour and kilometres per hour" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/90/Samoa_-_Speed_Limit.svg/120px-Samoa_-_Speed_Limit.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/90/Samoa_-_Speed_Limit.svg/180px-Samoa_-_Speed_Limit.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/90/Samoa_-_Speed_Limit.svg/240px-Samoa_-_Speed_Limit.svg.png 2x" data-file-width="572" data-file-height="572" /></a></span></div> <div class="gallerytext"><a href="/wiki/Samoa" title="Samoa">Samoa</a> uses both <a href="/wiki/Miles_per_hour" title="Miles per hour">miles per hour</a> and kilometres per hour</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:MX_road_sign_SR-9-050.svg" class="mw-file-description" title="50 km/h sign in Mexico"><img alt="50 km/h sign in Mexico" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9a/MX_road_sign_SR-9-050.svg/120px-MX_road_sign_SR-9-050.svg.png" decoding="async" width="120" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9a/MX_road_sign_SR-9-050.svg/180px-MX_road_sign_SR-9-050.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9a/MX_road_sign_SR-9-050.svg/240px-MX_road_sign_SR-9-050.svg.png 2x" data-file-width="550" data-file-height="550" /></a></span></div> <div class="gallerytext">50 km/h sign in <a href="/wiki/Speed_limits_in_Mexico" title="Speed limits in Mexico">Mexico</a></div> </li> </ul> <p>In 1972 the EU published a directive<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> (overhauled in 1979<sup id="cite_ref-42" class="reference"><a href="#cite_note-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup> to take British and Irish interests into account) that required member states to abandon CGS-based units in favour of SI. The use of SI implicitly required that member states use "km/h" as the shorthand for "kilometres per hour" on official<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">[</span>Note 1<span class="cite-bracket">]</span></a></sup> documents. </p><p>Another EU directive, published in 1975, regulates the layout of speedometers within the European Union, and requires the text "km/h" in all languages,<sup id="cite_ref-44" class="reference"><a href="#cite_note-44"><span class="cite-bracket">[</span>43<span class="cite-bracket">]</span></a></sup> even where that is not the natural abbreviation for the local version of "kilometres per hour". Examples include: </p> <ul><li>Dutch: "<span title="Dutch-language text"><i lang="nl">kilometer per uur</i></span>" ("hour" is "<span title="Dutch-language text"><i lang="nl">uur</i></span>" – does not start with "h"),</li> <li>Portuguese: "<span title="Portuguese-language text"><i lang="pt">quilómetro por hora</i></span>" ("kilometre" is "<span title="Portuguese-language text"><i lang="pt">quilómetro</i></span>" – does not start with "k")</li> <li>Irish: "<span title="Irish-language text"><i lang="ga">ciliméadar san uair</i></span>"</li> <li>Greek: "<span title="Greek-language text"><span lang="el">χιλιόμετρα ανά ώρα</span></span>" (a different script).</li></ul> <p>In 1988 the United States <a href="/wiki/National_Highway_Traffic_Safety_Administration" title="National Highway Traffic Safety Administration">National Highway Traffic Safety Administration</a> promulgated a rule stating that "MPH and/or km/h" were to be used in speedometer displays. On May 15, 2000, this was clarified to read "MPH, or MPH and km/h".<sup id="cite_ref-45" class="reference"><a href="#cite_note-45"><span class="cite-bracket">[</span>44<span class="cite-bracket">]</span></a></sup> However, the Federal Motor Vehicle Safety Standard number 101 ("Controls and Displays") allows "any combination of upper- and lowercase letters" to represent the units.<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">[</span>45<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Conversions">Conversions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=7" title="Edit section: Conversions"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="nowrap"><span data-sort-value="7000100000000000000♠"></span>3.6 km/h</span> ≡ <span class="nowrap"><span data-sort-value="7000100000000000000♠"></span>1 m/s</span>, the <a href="/wiki/SI_unit" class="mw-redirect" title="SI unit">SI unit</a> of speed, <a href="/wiki/Metre_per_second" title="Metre per second">metre per second</a></li> <li><span class="nowrap"><span data-sort-value="6999277777777777777♠"></span>1 km/h</span> ≈ <span class="nowrap"><span data-sort-value="6999277780000000000♠"></span>0.277<span style="margin-left:.25em;">78</span> m/s</span></li> <li><span class="nowrap"><span data-sort-value="6999277777777777777♠"></span>1 km/h</span> ≈ <span class="nowrap"><span data-sort-value="6999277777244800000♠"></span>0.621<span style="margin-left:.25em;">37</span> <a href="/wiki/Miles_per_hour" title="Miles per hour">mph</a></span> ≈ <span class="nowrap"><span data-sort-value="6999277776432000000♠"></span>0.911<span style="margin-left:.25em;">34</span> <a href="/wiki/Feet_per_second" class="mw-redirect" title="Feet per second">ft/s</a></span></li> <li><span class="nowrap"><span data-sort-value="6999514444444444444♠"></span>1 <a href="/wiki/Knot_(unit)" title="Knot (unit)">kn</a></span> ≡ <span class="nowrap"><span data-sort-value="6999514444444444444♠"></span>1.852 km/h</span> (exactly)</li> <li><span class="nowrap"><span data-sort-value="6999447040000000000♠"></span>1 mph</span> ≡ <span class="nowrap"><span data-sort-value="6999447040000000000♠"></span>1.609<span style="margin-left:.25em;">344</span> km/h</span></li></ul> <table class="wikitable"> <caption><span class="nowrap">Conversions between common units of speed</span> </caption> <tbody><tr> <th></th> <th><a href="/wiki/Metre_per_second" title="Metre per second">m/s</a></th> <th><a class="mw-selflink selflink">km/h</a></th> <th><a href="/wiki/Miles_per_hour" title="Miles per hour">mph (mi/h)</a></th> <th><a href="/wiki/Knot_(unit)" title="Knot (unit)">knot</a></th> <th><a href="/wiki/Foot_per_second" title="Foot per second">fps (ft/s)</a> </th></tr> <tr> <th>1 <a href="/wiki/Metre_per_second" title="Metre per second">m/s</a> = </th> <td>1</td> <td><span style="white-space: nowrap">3.600<span style="margin-left: 0.25em">000</span></span></td> <td><span style="white-space: nowrap">2.236<span style="margin-left: 0.25em">936</span></span>*</td> <td><span style="white-space: nowrap">1.943<span style="margin-left: 0.25em">844</span></span>*</td> <td><span style="white-space: nowrap">3.280<span style="margin-left: 0.25em">840</span></span>* </td></tr> <tr> <th>1 <a class="mw-selflink selflink">km/h</a> = </th> <td><span class="nowrap"><span data-sort-value="6999277778000000000♠"></span>0.277<span style="margin-left:.25em;">778</span></span>*</td> <td>1</td> <td><span class="nowrap"><span data-sort-value="6999621371000000000♠"></span>0.621<span style="margin-left:.25em;">371</span></span>*</td> <td><span class="nowrap"><span data-sort-value="6999539957000000000♠"></span>0.539<span style="margin-left:.25em;">957</span></span>*</td> <td><span class="nowrap"><span data-sort-value="6999911344000000000♠"></span>0.911<span style="margin-left:.25em;">344</span></span>* </td></tr> <tr> <th>1 <a href="/wiki/Miles_per_hour" title="Miles per hour">mph (mi/h)</a> = </th> <td><span class="nowrap"><span data-sort-value="6999447040000000000♠"></span>0.447<span style="margin-left:.25em;">04</span></span></td> <td><span class="nowrap"><span data-sort-value="7000160934400000000♠"></span>1.609<span style="margin-left:.25em;">344</span></span></td> <td>1</td> <td><span class="nowrap"><span data-sort-value="6999868976000000000♠"></span>0.868<span style="margin-left:.25em;">976</span></span>*</td> <td><span class="nowrap"><span data-sort-value="7000146666700000000♠"></span>1.466<span style="margin-left:.25em;">667</span></span>* </td></tr> <tr> <th>1 <a href="/wiki/Knot_(unit)" title="Knot (unit)">knot</a> = </th> <td><span class="nowrap"><span data-sort-value="6999514444000000000♠"></span>0.514<span style="margin-left:.25em;">444</span></span>*</td> <td>1.852</td> <td><span class="nowrap"><span data-sort-value="7000115077900000000♠"></span>1.150<span style="margin-left:.25em;">779</span></span>*</td> <td>1</td> <td><span class="nowrap"><span data-sort-value="7000168781000000000♠"></span>1.687<span style="margin-left:.25em;">810</span></span>* </td></tr> <tr> <th>1 <a href="/wiki/Foot_per_second" title="Foot per second">fps (ft/s)</a> = </th> <td><span class="nowrap"><span data-sort-value="6999304800000000000♠"></span>0.3048</span></td> <td><span class="nowrap"><span data-sort-value="7000109728000000000♠"></span>1.097<span style="margin-left:.25em;">28</span></span></td> <td><span class="nowrap"><span data-sort-value="6999681818000000000♠"></span>0.681<span style="margin-left:.25em;">818</span></span>*</td> <td><span class="nowrap"><span data-sort-value="6999592484000000000♠"></span>0.592<span style="margin-left:.25em;">484</span></span>*</td> <td>1 </td></tr></tbody></table><p> (* = approximate values) </p><div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=8" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Orders_of_magnitude_(speed)" title="Orders of magnitude (speed)">Orders of magnitude (speed)</a></li> <li><a href="/wiki/Speed_limits_in_the_United_Kingdom" class="mw-redirect" title="Speed limits in the United Kingdom">Speed limits in the United Kingdom</a></li> <li><a href="/wiki/Speed_limits_in_Canada#Signage" title="Speed limits in Canada">Speed limits in Canada</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=9" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-43"><span class="mw-cite-backlink"><b><a href="#cite_ref-43">^</a></b></span> <span class="reference-text">Until 2010, the directive covered "economic, public health, public safety or administrative purposes"; since then <a rel="nofollow" class="external text" href="https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32009L0003">it covers all aspects</a> of the <a href="/wiki/European_single_market" title="European single market">EU internal market</a>.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Kilometres_per_hour&action=edit&section=10" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> 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0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output 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title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Federal+Register&rft.atitle=Federal+Motor+Vehicle+Safety+Standards%3B+FMVSS+101--Technical+Correction--Speedometer+Display&rft.volume=64&rft.issue=94&rft.pages=30915-30918&rft.date=2000-05&rft.au=National+Highway+Traffic+Safety+Administration&rft_id=https%3A%2F%2Fwww.federalregister.gov%2Farticles%2F2000%2F05%2F15%2F00-11493%2Ffederal-motor-vehicle-safety-standards-fmvss-101-technical-correction-speedometer-display&rfr_id=info%3Asid%2Fen.wikipedia.org%3AKilometres+per+hour" class="Z3988"></span></span> </li> <li id="cite_note-46"><span class="mw-cite-backlink"><b><a href="#cite_ref-46">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFNational_Highway_Traffic_Safety_Administration" class="citation book cs1">National Highway Traffic Safety Administration. <a rel="nofollow" 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ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:North_America_topic" title="Template:North America topic"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:North_America_topic" title="Template talk:North America topic"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:North_America_topic" title="Special:EditPage/Template:North America topic"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Speed_limits_in_North_America" style="font-size:114%;margin:0 4em">Speed limits in North America</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Sovereign states</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Speed_limits_in_Antigua_and_Barbuda&action=edit&redlink=1" class="new" title="Speed limits in Antigua and Barbuda (page does not exist)">Antigua and Barbuda</a></li> <li><a href="/w/index.php?title=Speed_limits_in_the_Bahamas&action=edit&redlink=1" class="new" title="Speed limits in the Bahamas (page does not exist)">Bahamas</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Barbados&action=edit&redlink=1" class="new" title="Speed limits in Barbados (page does not exist)">Barbados</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Belize&action=edit&redlink=1" class="new" title="Speed limits in Belize (page does not exist)">Belize</a></li> <li><a href="/wiki/Speed_limits_in_Canada" title="Speed limits in Canada">Canada</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Costa_Rica&action=edit&redlink=1" class="new" title="Speed limits in Costa Rica (page does not exist)">Costa Rica</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Cuba&action=edit&redlink=1" class="new" title="Speed limits in Cuba (page does not exist)">Cuba</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Dominica&action=edit&redlink=1" class="new" title="Speed limits in Dominica (page does not exist)">Dominica</a></li> <li><a href="/w/index.php?title=Speed_limits_in_the_Dominican_Republic&action=edit&redlink=1" class="new" title="Speed limits in the Dominican Republic (page does not exist)">Dominican Republic</a></li> <li><a href="/w/index.php?title=Speed_limits_in_El_Salvador&action=edit&redlink=1" class="new" title="Speed limits in El Salvador (page does not exist)">El Salvador</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Grenada&action=edit&redlink=1" class="new" title="Speed limits in Grenada (page does not exist)">Grenada</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Guatemala&action=edit&redlink=1" class="new" title="Speed limits in Guatemala (page does not exist)">Guatemala</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Haiti&action=edit&redlink=1" class="new" title="Speed limits in Haiti (page does not exist)">Haiti</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Honduras&action=edit&redlink=1" class="new" title="Speed limits in Honduras (page does not exist)">Honduras</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Jamaica&action=edit&redlink=1" class="new" title="Speed limits in Jamaica (page does not exist)">Jamaica</a></li> <li><a href="/wiki/Speed_limits_in_Mexico" title="Speed limits in Mexico">Mexico</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Nicaragua&action=edit&redlink=1" class="new" title="Speed limits in Nicaragua (page does not exist)">Nicaragua</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Panama&action=edit&redlink=1" class="new" title="Speed limits in Panama (page does not exist)">Panama</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Saint_Kitts_and_Nevis&action=edit&redlink=1" class="new" title="Speed limits in Saint Kitts and Nevis (page does not exist)">Saint Kitts and Nevis</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Saint_Lucia&action=edit&redlink=1" class="new" title="Speed limits in Saint Lucia (page does not exist)">Saint Lucia</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Saint_Vincent_and_the_Grenadines&action=edit&redlink=1" class="new" title="Speed limits in Saint Vincent and the Grenadines (page does not exist)">Saint Vincent and the Grenadines</a></li> <li><a href="/wiki/Speed_limits_in_Trinidad_and_Tobago" title="Speed limits in Trinidad and Tobago">Trinidad and Tobago</a></li> <li><a href="/wiki/Speed_limits_in_the_United_States" title="Speed limits in the United States">United States</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Dependencies and<br />other territories</div></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Speed_limits_in_Anguilla&action=edit&redlink=1" class="new" title="Speed limits in Anguilla (page does not exist)">Anguilla</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Aruba&action=edit&redlink=1" class="new" title="Speed limits in Aruba (page does not exist)">Aruba</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Bermuda&action=edit&redlink=1" class="new" title="Speed limits in Bermuda (page does not exist)">Bermuda</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Bonaire&action=edit&redlink=1" class="new" title="Speed limits in Bonaire (page does not exist)">Bonaire</a></li> <li><a href="/w/index.php?title=Speed_limits_in_the_British_Virgin_Islands&action=edit&redlink=1" class="new" title="Speed limits in the British Virgin Islands (page does not exist)">British Virgin Islands</a></li> <li><a href="/w/index.php?title=Speed_limits_in_the_Cayman_Islands&action=edit&redlink=1" class="new" title="Speed limits in the Cayman Islands (page does not exist)">Cayman Islands</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Cura%C3%A7ao&action=edit&redlink=1" class="new" title="Speed limits in Curaçao (page does not exist)">Curaçao</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Greenland&action=edit&redlink=1" class="new" title="Speed limits in Greenland (page does not exist)">Greenland</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Guadeloupe&action=edit&redlink=1" class="new" title="Speed limits in Guadeloupe (page does not exist)">Guadeloupe</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Martinique&action=edit&redlink=1" class="new" title="Speed limits in Martinique (page does not exist)">Martinique</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Montserrat&action=edit&redlink=1" class="new" title="Speed limits in Montserrat (page does not exist)">Montserrat</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Puerto_Rico&action=edit&redlink=1" class="new" title="Speed limits in Puerto Rico (page does not exist)">Puerto Rico</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Saint_Barth%C3%A9lemy&action=edit&redlink=1" class="new" title="Speed limits in Saint Barthélemy (page does not exist)">Saint Barthélemy</a></li> <li><a href="/w/index.php?title=Speed_limits_in_the_Collectivity_of_Saint_Martin&action=edit&redlink=1" class="new" title="Speed limits in the Collectivity of Saint Martin (page does not exist)">Saint Martin</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Saint_Pierre_and_Miquelon&action=edit&redlink=1" class="new" title="Speed limits in Saint Pierre and Miquelon (page does not exist)">Saint Pierre and Miquelon</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Saba_(island)&action=edit&redlink=1" class="new" title="Speed limits in Saba (island) (page does not exist)">Saba</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Sint_Eustatius&action=edit&redlink=1" class="new" title="Speed limits in Sint Eustatius (page does not exist)">Sint Eustatius</a></li> <li><a href="/w/index.php?title=Speed_limits_in_Sint_Maarten&action=edit&redlink=1" class="new" title="Speed limits in Sint Maarten (page does not exist)">Sint Maarten</a></li> <li><a href="/w/index.php?title=Speed_limits_in_the_Turks_and_Caicos_Islands&action=edit&redlink=1" class="new" title="Speed limits in the Turks and Caicos Islands (page does not exist)">Turks and Caicos Islands</a></li> <li><a href="/w/index.php?title=Speed_limits_in_the_United_States_Virgin_Islands&action=edit&redlink=1" class="new" title="Speed limits in the United States Virgin Islands (page does not exist)">United States Virgin Islands</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" 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