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Se mere på \u003Ca href=\"/wiki/Wikipedia:Discord\" title=\"Wikipedia:Discord\"\u003EWikipedia:Discord\u003C/a\u003E\u003C/div\u003E\u003Cp\u003E\u003Ci\u003E\u003Csmall\u003E(\u003Ca href=\"/wiki/Hj%C3%A6lp:Sitenotice\" title=\"Hjælp:Sitenotice\"\u003ELæs her om sitenotice\u003C/a\u003E)\u003C/small\u003E\u003C/i\u003E\u003C/p\u003E\u003C/div\u003E\u003C/div\u003E\u003C/div\u003E\u003C/div\u003E";}}());</script></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Websted"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Indhold" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Indhold</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">skjul</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Indledning</div> </a> </li> <li id="toc-Almindelige_præfikser" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Almindelige_præfikser"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Almindelige præfikser</span> </div> </a> <ul id="toc-Almindelige_præfikser-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Komplet_SI-præfiks-tabel" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Komplet_SI-præfiks-tabel"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Komplet SI-præfiks-tabel</span> </div> </a> <ul id="toc-Komplet_SI-præfiks-tabel-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Udvidelse" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Udvidelse"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Udvidelse</span> </div> </a> <ul id="toc-Udvidelse-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Oprindelige_metriske_præfikser" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Oprindelige_metriske_præfikser"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Oprindelige metriske præfikser</span> </div> </a> <ul id="toc-Oprindelige_metriske_præfikser-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Eksempler" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Eksempler"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Eksempler</span> </div> </a> <ul id="toc-Eksempler-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Operatorpræcedens" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Operatorpræcedens"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Operatorpræcedens</span> </div> </a> <ul id="toc-Operatorpræcedens-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Anbefalinger" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Anbefalinger"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Anbefalinger</span> </div> </a> <ul id="toc-Anbefalinger-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Navnenes_oprindelse" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Navnenes_oprindelse"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Navnenes oprindelse</span> </div> </a> <ul id="toc-Navnenes_oprindelse-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Se_også" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Se_også"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Se også</span> </div> </a> <ul id="toc-Se_også-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Kilder" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Kilder"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Kilder</span> </div> </a> <ul id="toc-Kilder-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="Indhold" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Indholdsfortegnelse" > <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="Vis/skjul indholdsfortegnelsen" > <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">Vis/skjul indholdsfortegnelsen</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">SI-præfiks</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="Gå til en artikel på et andet sprog. Tilgængelig på 68 sprog" > <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-68" 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">68 sprog</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B3%D9%88%D8%A7%D8%A8%D9%82_%D8%A7%D9%84%D9%86%D8%B8%D8%A7%D9%85_%D8%A7%D9%84%D8%AF%D9%88%D9%84%D9%8A_%D9%84%D9%84%D9%88%D8%AD%D8%AF%D8%A7%D8%AA" title="سوابق النظام الدولي للوحدات – arabisk" lang="ar" hreflang="ar" data-title="سوابق النظام الدولي للوحدات" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D9%85%D8%B3%D8%A8%D9%82%D8%A9_%D9%85%D9%8A%D8%AA%D8%B1%D9%8A%D8%A9" title="مسبقة ميترية – Moroccan Arabic" lang="ary" hreflang="ary" data-title="مسبقة ميترية" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9F%D1%80%D1%8B%D1%81%D1%82%D0%B0%D1%9E%D0%BA%D1%96_%D0%A1%D0%86" title="Прыстаўкі СІ – belarusisk" lang="be" hreflang="be" data-title="Прыстаўкі СІ" data-language-autonym="Беларуская" data-language-local-name="belarusisk" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9F%D1%80%D1%8B%D1%81%D1%82%D0%B0%D1%9E%D0%BA%D1%96_%D0%A1%D0%86" title="Прыстаўкі СІ – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Прыстаўкі СІ" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D1%80%D0%B5%D0%B4%D1%81%D1%82%D0%B0%D0%B2%D0%BA%D0%B8_SI" title="Представки SI – bulgarsk" lang="bg" hreflang="bg" data-title="Представки SI" data-language-autonym="Български" data-language-local-name="bulgarsk" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AE%E0%A7%87%E0%A6%9F%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%95_%E0%A6%89%E0%A6%AA%E0%A6%B8%E0%A6%B0%E0%A7%8D%E0%A6%97" title="মেট্রিক উপসর্গ – bengali" lang="bn" hreflang="bn" data-title="মেট্রিক উপসর্গ" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Rakgerio%C3%B9_unanenno%C3%B9_an_SI" title="Rakgerioù unanennoù an SI – bretonsk" lang="br" hreflang="br" data-title="Rakgerioù unanennoù an SI" data-language-autonym="Brezhoneg" data-language-local-name="bretonsk" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Prefiksi_mjernih_jedinica" title="Prefiksi mjernih jedinica – bosnisk" lang="bs" hreflang="bs" data-title="Prefiksi mjernih jedinica" data-language-autonym="Bosanski" data-language-local-name="bosnisk" 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/Prefixos_del_Sistema_Internacional" title="Prefixos del Sistema Internacional – catalansk" lang="ca" hreflang="ca" data-title="Prefixos del Sistema Internacional" data-language-autonym="Català" data-language-local-name="catalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%BE%DB%8E%D8%B4%DA%AF%D8%B1%DB%95%DA%A9%D8%A7%D9%86%DB%8C_%D8%A6%DB%8E%D8%B3_%D8%A6%D8%A7%DB%8C" title="پێشگرەکانی ئێس ئای – sorani" lang="ckb" hreflang="ckb" data-title="پێشگرەکانی ئێس ئای" data-language-autonym="کوردی" data-language-local-name="sorani" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/P%C5%99edpona_soustavy_SI" title="Předpona soustavy SI – tjekkisk" lang="cs" hreflang="cs" data-title="Předpona soustavy SI" data-language-autonym="Čeština" data-language-local-name="tjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A1%D0%98_%D0%BF%D1%80%D0%B5%D1%84%D0%B8%D0%BA%D1%81%C4%95%D1%81%D0%B5%D0%BC" title="СИ префиксĕсем – tjuvasjisk" lang="cv" hreflang="cv" data-title="СИ префиксĕсем" data-language-autonym="Чӑвашла" data-language-local-name="tjuvasjisk" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Rhagddodiad_SI" title="Rhagddodiad SI – walisisk" lang="cy" hreflang="cy" data-title="Rhagddodiad SI" data-language-autonym="Cymraeg" data-language-local-name="walisisk" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-de badge-Q70894304 mw-list-item" title=""><a href="https://de.wikipedia.org/wiki/SI-Vorsatz" title="SI-Vorsatz – tysk" lang="de" hreflang="de" data-title="SI-Vorsatz" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Metric_prefix" title="Metric prefix – engelsk" lang="en" hreflang="en" data-title="Metric prefix" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Dekoblaj_kaj_dekonaj_unuoj" title="Dekoblaj kaj dekonaj unuoj – esperanto" lang="eo" hreflang="eo" data-title="Dekoblaj kaj dekonaj unuoj" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Prefijos_del_Sistema_Internacional" title="Prefijos del Sistema Internacional – spansk" lang="es" hreflang="es" data-title="Prefijos del Sistema Internacional" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/%C3%9Chikute_detsimaaleesliited" title="Ühikute detsimaaleesliited – estisk" lang="et" hreflang="et" data-title="Ühikute detsimaaleesliited" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/SI_aurrizkiak" title="SI aurrizkiak – baskisk" lang="eu" hreflang="eu" data-title="SI aurrizkiak" data-language-autonym="Euskara" data-language-local-name="baskisk" 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/%D9%BE%DB%8C%D8%B4%D9%88%D9%86%D8%AF%D9%87%D8%A7%DB%8C_%D8%A7%D8%B3%E2%80%8C%D8%A2%DB%8C" title="پیشوندهای اس‌آی – persisk" lang="fa" hreflang="fa" data-title="پیشوندهای اس‌آی" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi badge-Q70894304 mw-list-item" title=""><a href="https://fi.wikipedia.org/wiki/SI-etuliite" title="SI-etuliite – finsk" lang="fi" hreflang="fi" data-title="SI-etuliite" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/SI-prefiks" title="SI-prefiks – færøsk" lang="fo" hreflang="fo" data-title="SI-prefiks" data-language-autonym="Føroyskt" data-language-local-name="færøsk" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Pr%C3%A9fixes_du_Syst%C3%A8me_international_d%27unit%C3%A9s" title="Préfixes du Système international d'unités – fransk" lang="fr" hreflang="fr" data-title="Préfixes du Système international d'unités" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/SI-foarheaksel" title="SI-foarheaksel – vestfrisisk" lang="fy" hreflang="fy" data-title="SI-foarheaksel" data-language-autonym="Frysk" data-language-local-name="vestfrisisk" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%AA%D7%97%D7%99%D7%9C%D7%99%D7%95%D7%AA_%D7%91%D7%9E%D7%A2%D7%A8%D7%9B%D7%AA_%D7%94%D7%99%D7%97%D7%99%D7%93%D7%95%D7%AA_%D7%94%D7%91%D7%99%D7%9F-%D7%9C%D7%90%D7%95%D7%9E%D7%99%D7%AA" title="תחיליות במערכת היחידות הבין-לאומית – hebraisk" lang="he" hreflang="he" data-title="תחיליות במערכת היחידות הבין-לאומית" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/SI_%E0%A4%89%E0%A4%AA%E0%A4%B8%E0%A4%B0%E0%A5%8D%E0%A4%97" title="SI उपसर्ग – hindi" lang="hi" hreflang="hi" data-title="SI उपसर्ग" 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/Predmetci_(prefiksi)_mjernih_jedinica" title="Predmetci (prefiksi) mjernih jedinica – kroatisk" lang="hr" hreflang="hr" data-title="Predmetci (prefiksi) mjernih jedinica" data-language-autonym="Hrvatski" data-language-local-name="kroatisk" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Prefiks_Sist%C3%A8m_ent%C3%A8nasyonal_inite_yo" title="Prefiks Sistèm entènasyonal inite yo – haitisk" lang="ht" hreflang="ht" data-title="Prefiks Sistèm entènasyonal inite yo" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haitisk" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/SI-prefixum" title="SI-prefixum – ungarsk" lang="hu" hreflang="hu" data-title="SI-prefixum" data-language-autonym="Magyar" data-language-local-name="ungarsk" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8F%D5%A1%D5%BD%D5%B6%D5%B8%D6%80%D5%A4%D5%A1%D5%AF%D5%A1%D5%B6_%D5%B6%D5%A1%D5%AD%D5%A1%D5%AE%D5%A1%D5%B6%D6%81%D5%B6%D5%A5%D6%80" title="Տասնորդական նախածանցներ – armensk" lang="hy" hreflang="hy" data-title="Տասնորդական նախածանցներ" data-language-autonym="Հայերեն" data-language-local-name="armensk" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Prefixo_del_SI" title="Prefixo del SI – interlingua" lang="ia" hreflang="ia" data-title="Prefixo del SI" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Awalan_SI" title="Awalan SI – indonesisk" lang="id" hreflang="id" data-title="Awalan SI" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Forskeyti_SI-kerfisins" title="Forskeyti SI-kerfisins – islandsk" lang="is" hreflang="is" data-title="Forskeyti SI-kerfisins" data-language-autonym="Íslenska" data-language-local-name="islandsk" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Prefissi_del_Sistema_internazionale_di_unit%C3%A0_di_misura" title="Prefissi del Sistema internazionale di unità di misura – italiensk" lang="it" hreflang="it" data-title="Prefissi del Sistema internazionale di unità di misura" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/SI%E6%8E%A5%E9%A0%AD%E8%AA%9E" title="SI接頭語 – japansk" lang="ja" hreflang="ja" data-title="SI接頭語" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Ater-ater_SI" title="Ater-ater SI – javanesisk" lang="jv" hreflang="jv" data-title="Ater-ater SI" data-language-autonym="Jawa" data-language-local-name="javanesisk" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A1%E1%83%98_%E1%83%97%E1%83%90%E1%83%95%E1%83%A1%E1%83%90%E1%83%A0%E1%83%97%E1%83%94%E1%83%91%E1%83%98" title="სი თავსართები – georgisk" lang="ka" hreflang="ka" data-title="სი თავსართები" data-language-autonym="ქართული" data-language-local-name="georgisk" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%94%E1%9E%BB%E1%9E%96%E1%9F%92%E1%9E%9C%E1%9E%94%E1%9E%91%E1%9E%93%E1%9F%85%E1%9E%80%E1%9F%92%E1%9E%93%E1%9E%BB%E1%9E%84%E1%9E%94%E1%9F%92%E1%9E%9A%E1%9E%96%E1%9F%90%E1%9E%93%E1%9F%92%E1%9E%92%E1%9E%81%E1%9F%92%E1%9E%93%E1%9E%B6%E1%9E%8F%E1%9E%A2%E1%9E%93%E1%9F%92%E1%9E%8F%E1%9E%9A%E1%9E%87%E1%9E%B6%E1%9E%8F%E1%9E%B7" title="បុព្វបទនៅក្នុងប្រព័ន្ធខ្នាតអន្តរជាតិ – khmer" lang="km" hreflang="km" data-title="បុព្វបទនៅក្នុងប្រព័ន្ធខ្នាតអន្តរជាតិ" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/SI_%EC%A0%91%EB%91%90%EC%96%B4" title="SI 접두어 – koreansk" lang="ko" hreflang="ko" data-title="SI 접두어" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/L%C3%ABscht_vun_de_Prefixe_fir_Moosseenheeten" title="Lëscht vun de Prefixe fir Moosseenheeten – luxembourgsk" lang="lb" hreflang="lb" data-title="Lëscht vun de Prefixe fir Moosseenheeten" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxembourgsk" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Prefisas_de_la_sistem_de_metres" title="Prefisas de la sistem de metres – Lingua Franca Nova" lang="lfn" hreflang="lfn" data-title="Prefisas de la sistem de metres" data-language-autonym="Lingua Franca Nova" data-language-local-name="Lingua Franca Nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/SI_sistemos_prie%C5%A1d%C4%97liai" title="SI sistemos priešdėliai – litauisk" lang="lt" hreflang="lt" data-title="SI sistemos priešdėliai" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Metriskie_pried%C4%93k%C4%BCi" title="Metriskie priedēkļi – lettisk" lang="lv" hreflang="lv" data-title="Metriskie priedēkļi" data-language-autonym="Latviešu" data-language-local-name="lettisk" 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/SI-%D0%BF%D1%80%D0%B5%D1%82%D1%81%D1%82%D0%B0%D0%B2%D0%BA%D0%B0" title="SI-претставка – makedonsk" lang="mk" hreflang="mk" data-title="SI-претставка" data-language-autonym="Македонски" data-language-local-name="makedonsk" 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/Awalan_metrik" title="Awalan metrik – malajisk" lang="ms" hreflang="ms" data-title="Awalan metrik" data-language-autonym="Bahasa Melayu" data-language-local-name="malajisk" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/SI-voorvoegsel" title="SI-voorvoegsel – nederlandsk" lang="nl" hreflang="nl" data-title="SI-voorvoegsel" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/SI-prefiks" title="SI-prefiks – nynorsk" lang="nn" hreflang="nn" data-title="SI-prefiks" data-language-autonym="Norsk nynorsk" data-language-local-name="nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/SI-prefiks" title="SI-prefiks – bokmål" lang="nb" hreflang="nb" data-title="SI-prefiks" data-language-autonym="Norsk bokmål" data-language-local-name="bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Prefixe_dau_Sist%C3%A8ma_Internacionau" title="Prefixe dau Sistèma Internacionau – occitansk" lang="oc" hreflang="oc" data-title="Prefixe dau Sistèma Internacionau" data-language-autonym="Occitan" data-language-local-name="occitansk" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Przedrostek_SI" title="Przedrostek SI – polsk" lang="pl" hreflang="pl" data-title="Przedrostek SI" data-language-autonym="Polski" data-language-local-name="polsk" 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/Prefixos_do_Sistema_Internacional_de_Unidades" title="Prefixos do Sistema Internacional de Unidades – portugisisk" lang="pt" hreflang="pt" data-title="Prefixos do Sistema Internacional de Unidades" data-language-autonym="Português" data-language-local-name="portugisisk" 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/Prefix_SI" title="Prefix SI – rumænsk" lang="ro" hreflang="ro" data-title="Prefix SI" data-language-autonym="Română" data-language-local-name="rumænsk" 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%9F%D1%80%D0%B8%D1%81%D1%82%D0%B0%D0%B2%D0%BA%D0%B8_%D0%A1%D0%98" title="Приставки СИ – russisk" lang="ru" hreflang="ru" data-title="Приставки СИ" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%9F%D1%80%D0%B5%D1%84%D0%B8%D0%BA%D1%81%D1%8B_SI" title="Префиксы SI – Rusyn" lang="rue" hreflang="rue" data-title="Префиксы SI" data-language-autonym="Русиньскый" data-language-local-name="Rusyn" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Prifissi_d%C3%BB_Sistema_%27ntirnazziunali_di_unitati_di_misura" title="Prifissi dû Sistema 'ntirnazziunali di unitati di misura – siciliansk" lang="scn" hreflang="scn" data-title="Prifissi dû Sistema 'ntirnazziunali di unitati di misura" data-language-autonym="Sicilianu" data-language-local-name="siciliansk" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/SI_prefiks" title="SI prefiks – serbokroatisk" lang="sh" hreflang="sh" data-title="SI prefiks" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatisk" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Predpone_SI" title="Predpone SI – slovensk" lang="sl" hreflang="sl" data-title="Predpone SI" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Parashtesat_e_Sistemit_Nd%C3%ABrkomb%C3%ABtar" title="Parashtesat e Sistemit Ndërkombëtar – albansk" lang="sq" hreflang="sq" data-title="Parashtesat e Sistemit Ndërkombëtar" data-language-autonym="Shqip" data-language-local-name="albansk" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A1%D0%98_%D0%BF%D1%80%D0%B5%D1%84%D0%B8%D0%BA%D1%81" title="СИ префикс – serbisk" lang="sr" hreflang="sr" data-title="СИ префикс" data-language-autonym="Српски / srpski" data-language-local-name="serbisk" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/SI-prefix" title="SI-prefix – svensk" lang="sv" hreflang="sv" data-title="SI-prefix" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-szl mw-list-item"><a href="https://szl.wikipedia.org/wiki/Przedrostek_SI" title="Przedrostek SI – schlesisk" lang="szl" hreflang="szl" data-title="Przedrostek SI" data-language-autonym="Ślůnski" data-language-local-name="schlesisk" class="interlanguage-link-target"><span>Ślůnski</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%B3%E0%B8%AD%E0%B8%B8%E0%B8%9B%E0%B8%AA%E0%B8%A3%E0%B8%A3%E0%B8%84%E0%B9%80%E0%B8%AD%E0%B8%AA%E0%B9%84%E0%B8%AD" title="คำอุปสรรคเอสไอ – thai" lang="th" hreflang="th" data-title="คำอุปสรรคเอสไอ" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D1%80%D0%B5%D1%84%D1%96%D0%BA%D1%81%D0%B8_%D0%BE%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D1%8C_%D0%B2%D0%B8%D0%BC%D1%96%D1%80%D1%8E%D0%B2%D0%B0%D0%BD%D0%BD%D1%8F" title="Префікси одиниць вимірювання – ukrainsk" lang="uk" hreflang="uk" data-title="Префікси одиниць вимірювання" data-language-autonym="Українська" data-language-local-name="ukrainsk" 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/%D9%85%DB%8C%D9%B9%D8%B1%DA%A9_%D8%B3%D8%A7%D8%A8%D9%82%DB%81_%D8%AC%D8%A7%D8%AA" title="میٹرک سابقہ جات – urdu" lang="ur" hreflang="ur" data-title="میٹرک سابقہ جات" 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/Ti%E1%BB%81n_t%E1%BB%91_SI" title="Tiền tố SI – vietnamesisk" lang="vi" hreflang="vi" data-title="Tiền tố SI" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%9B%BD%E9%99%85%E5%8D%95%E4%BD%8D%E5%88%B6%E8%AF%8D%E5%A4%B4" title="国际单位制词头 – wu-kinesisk" lang="wuu" hreflang="wuu" data-title="国际单位制词头" data-language-autonym="吴语" data-language-local-name="wu-kinesisk" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%9B%BD%E9%99%85%E5%8D%95%E4%BD%8D%E5%88%B6%E8%AF%8D%E5%A4%B4" title="国际单位制词头 – kinesisk" lang="zh" hreflang="zh" data-title="国际单位制词头" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%90%AC%E5%9C%8B%E5%96%AE%E4%BD%8D%E5%AD%97%E9%A0%AD" title="萬國單位字頭 – kantonesisk" lang="yue" hreflang="yue" data-title="萬國單位字頭" data-language-autonym="粵語" data-language-local-name="kantonesisk" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q131299#sitelinks-wikipedia" title="Redigér sproglinks" class="wbc-editpage">Redigér links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Navnerum"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a 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side"><span>Sideinformation</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Speciel:Citer&page=SI-pr%C3%A6fiks&id=11705248&wpFormIdentifier=titleform" title="Information om, hvordan man kan citere denne side"><span>Referer til denne side</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Speciel:UrlShortener&url=https%3A%2F%2Fda.wikipedia.org%2Fwiki%2FSI-pr%25C3%25A6fiks"><span>Hent forkortet URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Speciel:QrCode&url=https%3A%2F%2Fda.wikipedia.org%2Fwiki%2FSI-pr%25C3%25A6fiks"><span>Download QR-kode</span></a></li> </ul> </div> </div> <div id="p-Organisation" class="vector-menu mw-portlet mw-portlet-Organisation" > <div class="vector-menu-heading"> Organisation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-contact" class="mw-list-item"><a href="/wiki/Wikipedia:Kontakt_Wikipedia"><span>Kontakt Wikipedia</span></a></li><li id="n-Wikimedia-Danmark" class="mw-list-item"><a href="https://dk.wikimedia.org/wiki/"><span>Wikimedia Danmark</span></a></li><li id="n-GLAM" class="mw-list-item"><a href="/wiki/Wikipedia:GLAM"><span>GLAM</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Udskriv/eksportér </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Speciel:Bog&bookcmd=book_creator&referer=SI-pr%C3%A6fiks"><span>Lav en bog</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speciel:DownloadAsPdf&page=SI-pr%C3%A6fiks&action=show-download-screen"><span>Download som PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=SI-pr%C3%A6fiks&printable=yes" title="Printervenlig udgave af denne side [p]" accesskey="p"><span>Udskriftsvenlig udgave</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> I andre projekter </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:SI_prefixes" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q131299" title="Link til tilknyttet emne i Wikidata [g]" accesskey="g"><span>Wikidata-element</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Sideværktøjer"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Udseende"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Udseende</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flyt til sidebjælken</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skjul</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Fra Wikipedia, den frie encyklopædi</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Omdirigeret fra <a href="/w/index.php?title=Deka&redirect=no" class="mw-redirect" title="Deka">Deka</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="da" dir="ltr"><dl><dd><span typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Disambig_bordered_fade.svg/20px-Disambig_bordered_fade.svg.png" decoding="async" width="19" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Disambig_bordered_fade.svg/40px-Disambig_bordered_fade.svg.png 1.5x" data-file-width="236" data-file-height="185" /></span></span><i> For alternative betydninger, se <a href="/wiki/Pr%C3%A6fiks_(flertydig)" class="mw-disambig" title="Præfiks (flertydig)">Præfiks (flertydig)</a>.</i> <small>(<a href="/wiki/Speciel:Pr%C3%A6fiksindeks/Pr%C3%A6fiks" title="Speciel:Præfiksindeks/Præfiks">Se også artikler, som begynder med Præfiks</a>)</small></dd></dl> <p>Et <b>SI-præfiks</b><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> er et <a href="/wiki/Pr%C3%A6fiks" title="Præfiks">præfiks</a>, som kan anvendes på enhver <a href="/wiki/Syst%C3%A8me_International_d%27Unit%C3%A9s" class="mw-redirect" title="Système International d'Unités">SI-enhed</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><p>For eksempel ganger præfikset "kilo" med ét tusind, så én <i>kilo</i>meter er 1 000 <a href="/wiki/Meter" title="Meter">meter</a> og én <i>kilo</i>watt er 1 000 <a href="/wiki/Watt" title="Watt">watt</a>. Præfikset "milli" dividerer med ét tusind, så én <i>milli</i>meter er en tusindedel af en meter (der går 1 000 millimeter på en meter); og én <i>milli</i>liter er én tusindedel af en <a href="/wiki/Liter" title="Liter">liter</a>. Dét at det samme præfiks kan anvendes på enhver <a href="/wiki/Syst%C3%A8me_International_d%27Unit%C3%A9s" class="mw-redirect" title="Système International d'Unités">SI-enhed</a>, er en af SI systemets styrker. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Almindelige_præfikser"><span id="Almindelige_pr.C3.A6fikser"></span>Almindelige præfikser</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=1" title="Redigér afsnit: Almindelige præfikser" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=1" title="Edit section's source code: Almindelige præfikser"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>De mest almindelige anvendte præfikser er: </p> <ul><li>giga = 10<sup>9</sup> = <a href="/wiki/Milliard" class="mw-redirect" title="Milliard">milliard</a> = 1.000.000.000 (dvs. ét tusind millioner)</li> <li>mega = million = 1.000.000</li> <li>kilo = tusind = 1.000</li> <li>deci = en tiendedel = 0,1</li> <li>centi = en hundrededel = 0,01</li> <li>milli = en tusindedel = 0,001</li></ul> <div class="mw-heading mw-heading2"><h2 id="Komplet_SI-præfiks-tabel"><span id="Komplet_SI-pr.C3.A6fiks-tabel"></span>Komplet SI-præfiks-tabel</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=2" title="Redigér afsnit: Komplet SI-præfiks-tabel" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=2" title="Edit section's source code: Komplet SI-præfiks-tabel"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable" style="background:#FDFDFD"> <tbody><tr style="text-align: center; line-height: 22pt; background:#E8E8E8"> <td colspan="2"><span style="font-size:larger"><b>Præfiks</b></span></td> <td colspan="4"><span style="font-size:larger"><b>Tal</b></span></td> <td colspan="2"><span style="font-size:larger"><b>Præfiks fra</b></span> </td></tr> <tr style="background:#F5F5F5"> <td><b>Navn</b></td> <td><b>Symbol</b></td> <td><b>Navn</b></td> <td><b>1000<sup>m</sup></b></td> <td><b>10<sup>n</sup></b></td> <td><b>Decimaltal</b></td> <td><b>År</b></td> <td><b>Etymologi</b> </td></tr> <tr> <td><a href="/wiki/Quetta_(SI-pr%C3%A6fiks)" class="mw-redirect" title="Quetta (SI-præfiks)">quetta</a><sup id="cite_ref-ing2022_3-0" class="reference"><a href="#cite_note-ing2022-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ns2022_4-0" class="reference"><a href="#cite_note-ns2022-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></td> <td>    Q</td> <td><a href="/wiki/Quintillion" class="mw-redirect" title="Quintillion">Quintillion</a></td> <td>1000<sup>10</sup></td> <td>10<sup>30</sup></td> <td style="text-align: right">1 000 000 000 000 000 000 000 000 000 000</td> <td rowspan="2">2022</td> <td> </td></tr> <tr> <td><a href="/wiki/Ronna" class="mw-redirect" title="Ronna">ronna</a><sup id="cite_ref-ing2022_3-1" class="reference"><a href="#cite_note-ing2022-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ns2022_4-1" class="reference"><a href="#cite_note-ns2022-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></td> <td>    R</td> <td><a href="/wiki/Kvadrilliard" class="mw-redirect" title="Kvadrilliard">kvadrilliard</a></td> <td>1000<sup>9</sup></td> <td>10<sup>27</sup></td> <td style="text-align: right">1 000 000 000 000 000 000 000 000 000</td> <td> </td></tr> <tr> <td><a href="/wiki/Yotta" class="mw-redirect" title="Yotta">yotta</a></td> <td>    Y</td> <td><a href="/wiki/Kvadrillion" class="mw-redirect" title="Kvadrillion">kvadrillion</a></td> <td>1000<sup>8</sup></td> <td>10<sup>24</sup></td> <td style="text-align: right">1 000 000 000 000 000 000 000 000</td> <td rowspan="2">1991</td> <td><a href="/wiki/Gr%C3%A6sk_(sprog)" title="Græsk (sprog)">græsk</a> ὀκτώ, <i>okto</i>, <i>otte</i> for 1000<sup>8</sup> </td></tr> <tr> <td><a href="/wiki/Zetta" class="mw-redirect" title="Zetta">zetta</a></td> <td>    Z</td> <td><a href="/wiki/Trilliard" class="mw-redirect" title="Trilliard">trilliard</a></td> <td>1000<sup>7</sup></td> <td>10<sup>21</sup></td> <td style="text-align: right">1.000.000.000.000.000.000.000</td> <td>græsk bogstav ζ, <i>zeta</i>, i oldgr. ζῆτα, <i>sept</i>, <i>syv</i> for 1000<sup>7</sup> </td></tr> <tr> <td><a href="/wiki/Exa" class="mw-redirect" title="Exa">exa</a></td> <td>    E</td> <td><a href="/wiki/Trillion" title="Trillion">trillion</a></td> <td>1000<sup>6</sup></td> <td>10<sup>18</sup></td> <td style="text-align: right">1.000.000.000.000.000.000</td> <td rowspan="2">1975</td> <td>græsk ἕξ, <i>hex</i>, <i>seks</i> for 1000<sup>6</sup> </td></tr> <tr> <td><a href="/wiki/Peta" class="mw-redirect" title="Peta">peta</a></td> <td>    P</td> <td><a href="/wiki/Billiard" class="mw-redirect" title="Billiard">billiard</a></td> <td>1000<sup>5</sup></td> <td>10<sup>15</sup></td> <td style="text-align: right">1.000.000.000.000.000</td> <td>græsk πέντε, <i>pente</i>, <i>fem</i> for 1000<sup>5</sup> </td></tr> <tr> <td><a href="/wiki/Tera" class="mw-redirect" title="Tera">tera</a></td> <td>    T</td> <td><a href="/wiki/Billion" title="Billion">billion</a></td> <td>1000<sup>4</sup></td> <td>10<sup>12</sup></td> <td style="text-align: right">1.000.000.000.000</td> <td rowspan="3">1960</td> <td>græsk τέρας, <i>teras</i>, <i>monster</i> </td></tr> <tr> <td><a href="/wiki/Giga" class="mw-redirect" title="Giga">giga</a></td> <td>    G</td> <td><a href="/wiki/Milliard" class="mw-redirect" title="Milliard">milliard</a></td> <td>1000<sup>3</sup></td> <td>10<sup>9</sup></td> <td style="text-align: right">1.000.000.000</td> <td>græsk γίγας, <i>gigas</i>, <i>kæmpe</i> </td></tr> <tr> <td><a href="/wiki/Mega" class="mw-redirect" title="Mega">mega</a></td> <td>    M</td> <td><a href="/wiki/Million" title="Million">million</a></td> <td>1000<sup>2</sup></td> <td>10<sup>6</sup></td> <td style="text-align: right">1.000.000</td> <td>græsk μέγας, <i>megas</i>, <i>stort</i> </td></tr> <tr> <td><a href="/wiki/Kilo" class="mw-redirect" title="Kilo">kilo</a></td> <td>    k</td> <td><a href="/wiki/1000_(tal)" title="1000 (tal)">tusind</a></td> <td>1000<sup>1</sup></td> <td>10<sup>3</sup></td> <td style="text-align:right">1.000</td> <td rowspan="3">1795</td> <td>græsk χίλιοι, <i>khilioi</i>, <i>tusind</i> </td></tr> <tr> <td><a href="/wiki/Hekto" title="Hekto">hekto</a></td> <td>    h</td> <td><a href="/wiki/100_(tal)" title="100 (tal)">hundrede</a></td> <td>1000<sup><small> </small><sup>2</sup>/<sub>3</sub></sup></td> <td>10<sup>2</sup></td> <td style="text-align: right">100</td> <td>græsk ἑκατόν, <i>hekaton</i>, <i>hundrede</i> </td></tr> <tr> <td><a href="/wiki/Deka" class="mw-redirect" title="Deka">deka</a></td> <td>    da</td> <td><a href="/wiki/10_(tal)" title="10 (tal)">ti</a></td> <td>1000<sup><sup>1</sup>/<sub>3</sub></sup></td> <td>10<sup>1</sup></td> <td style="text-align: right">10</td> <td>græsk δέκα, <i>deka</i>, <i>ti</i> </td></tr> <tr bgcolor="white"> <td></td> <td></td> <td><a href="/wiki/1_(tal)" title="1 (tal)">en / et</a></td> <td>1000<sup>0</sup></td> <td>10<sup>0</sup></td> <td style="text-align: center">1</td> <td></td> <td> </td></tr> <tr> <td><a href="/wiki/Deci" class="mw-redirect" title="Deci">deci</a></td> <td>    d</td> <td>tiendedel</td> <td>1000<sup>-<sup>1</sup>/<sub>3</sub></sup></td> <td>10<sup>-1</sup></td> <td>0,1</td> <td rowspan="3">1795</td> <td><a href="/wiki/Latin" title="Latin">latin</a> <i>decimus</i>, <i>tiende</i> </td></tr> <tr> <td><a href="/wiki/Centi" class="mw-redirect" title="Centi">centi</a></td> <td>    c</td> <td>hundrededel</td> <td>1000<sup>-<small> </small><sup>2</sup>/<sub>3</sub></sup></td> <td>10<sup>-2</sup></td> <td>0,01</td> <td>latin <i>centum</i>, <i>hundrede</i> </td></tr> <tr> <td><a href="/wiki/Milli" class="mw-redirect" title="Milli">milli</a></td> <td>    m</td> <td>tusindedel</td> <td>1000<sup>-1</sup></td> <td>10<sup>−3</sup></td> <td>0,001</td> <td>latin <i>mille</i>, <i>tusind</i> </td></tr> <tr> <td><a href="/wiki/Mikro" class="mw-redirect" title="Mikro">mikro</a></td> <td>    µ</td> <td>milliontedel</td> <td>1000<sup>-2</sup></td> <td>10<sup>−6</sup></td> <td>0,000 001</td> <td rowspan="3">1960</td> <td>græsk μικρός, <i>mikros</i>, <i>småt</i> </td></tr> <tr> <td><a href="/wiki/Nano" class="mw-redirect" title="Nano">nano</a></td> <td>    n</td> <td>milliardtedel</td> <td>1000<sup>-3</sup></td> <td>10<sup>−9</sup></td> <td>0,000 000 001</td> <td>græsk νάνος, <i>nanos</i>, <i>dværg</i> </td></tr> <tr> <td><a href="/wiki/Piko" class="mw-redirect" title="Piko">piko</a></td> <td>    p</td> <td>billiontedel</td> <td>1000<sup>-4</sup></td> <td>10<sup>−12</sup></td> <td>0,000 000 000 001</td> <td><a href="/wiki/Italiensk_(sprog)" title="Italiensk (sprog)">italiensk</a> <i>piccolo</i>, <i>småt</i> </td></tr> <tr> <td><a href="/wiki/Femto" class="mw-redirect" title="Femto">femto</a></td> <td>    f</td> <td>billiardtedel</td> <td>1000<sup>-5</sup></td> <td>10<sup>−15</sup></td> <td>0,000 000 000 000 001</td> <td rowspan="2">1964</td> <td><a href="/wiki/Dansk_(sprog)" title="Dansk (sprog)">dansk</a> <i>femten</i> for 10<sup>−15</sup> </td></tr> <tr> <td><a href="/wiki/Atto" class="mw-redirect" title="Atto">atto</a></td> <td>    a</td> <td>trilliontedel</td> <td>1000<sup>-6</sup></td> <td>10<sup>−18</sup></td> <td>0,000 000 000 000 000 001</td> <td>dansk <i>atten</i> for 10<sup>−18</sup> </td></tr> <tr> <td><a href="/wiki/Zepto-" class="mw-redirect" title="Zepto-">zepto</a></td> <td>    z</td> <td>trilliardtedel</td> <td>1000<sup>-7</sup></td> <td>10<sup>−21</sup></td> <td>0,000 000 000 000 000 000 001</td> <td rowspan="2">1991</td> <td>latin <i>septem</i>, <i>syv</i> for 1000<sup>-7</sup> </td></tr> <tr> <td><a href="/wiki/Yokto" class="mw-redirect" title="Yokto">yokto</a></td> <td>    y</td> <td>kvadrilliontedel</td> <td>1000<sup>-8</sup></td> <td>10<sup>−24</sup></td> <td>0,000 000 000 000 000 000 000 001</td> <td>græsk ὀκτώ, <i>okto</i>, <i>otte</i> for 1000<sup>-8</sup> </td></tr> <tr> <td><a href="/wiki/Ronto" class="mw-redirect" title="Ronto">ronto</a><sup id="cite_ref-ing2022_3-2" class="reference"><a href="#cite_note-ing2022-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ns2022_4-2" class="reference"><a href="#cite_note-ns2022-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></td> <td>    r</td> <td>kvadrilliardedel</td> <td>1000<sup>-9</sup></td> <td>10<sup>−27</sup></td> <td>0,000 000 000 000 000 000 000 000 001</td> <td rowspan="2">2022</td> <td> </td></tr> <tr> <td><a href="/wiki/Quecto" class="mw-redirect" title="Quecto">quecto</a><sup id="cite_ref-ing2022_3-3" class="reference"><a href="#cite_note-ing2022-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ns2022_4-3" class="reference"><a href="#cite_note-ns2022-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></td> <td>    q</td> <td>Quintilliontedel</td> <td>1000<sup>-10</sup></td> <td>10<sup>−30</sup></td> <td>0,000 000 000 000 000 000 000 000 000 001</td> <td> </td></tr></tbody></table> <p>Selv om mikro (µ) først blev officielt præfiks i <a href="/wiki/1960" title="1960">1960</a>, blev det anvendt af <a href="/wiki/Naturvidenskab" title="Naturvidenskab">naturvidenskabsfolk</a> allerede fra begyndelsen af <a href="/wiki/1900-tallet" class="mw-redirect" title="1900-tallet">1900-tallet</a>. Mega og mikro blev foreslået af <a href="/w/index.php?title=British_Association_for_the_Advancement_of_Science&action=edit&redlink=1" class="new" title="British Association for the Advancement of Science (ikke skrevet endnu)">British Association for the Advancement of Science</a> i <a href="/wiki/1873" title="1873">1873</a>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>Bemærk at man i forskellige lande bruger to forskellige systemer for <a href="/wiki/Den_lange_og_den_korte_skala_for_store_tal" title="Den lange og den korte skala for store tal">navne på store tal</a>, sådan at f.eks. <i>en milliard</i> hedder <i>a billion</i> på <a href="/wiki/USA" title="USA">amerikansk</a>. Ordet <i>billion</i> kan således være tvetydigt i en international sammenhæng. En af fordelene ved SI-præfikserne er, at de er entydige. </p><p><a href="/wiki/Stavning" class="mw-redirect" title="Stavning">Stavningen</a> af de forskellige præfikser kan dog variere lidt fra <a href="/wiki/Sprog" title="Sprog">sprog</a> til sprog. Som et eksempel staves hekto- og kilo- henholdsvis <i>etto-</i> og <i>chilo-</i> på <a href="/wiki/Italiensk_(sprog)" title="Italiensk (sprog)">italiensk</a>. De samme to præfikser staves <i>hecto-</i> og <i>kilo-</i> på <a href="/wiki/Engelsk_(sprog)" title="Engelsk (sprog)">engelsk</a>, der er ingen stavemåde, som er mere korrekt end andre da det, ligesom andre ord, afhænger af sproget. </p><p>Symbolerne for præfikserne er internationale og ufravigelige, så italienerne bruger også <b>km</b> som symbol for <i>chilometro</i>. </p><p>Bemærk at symbolet for kilo er et lille "k"; det store "K" er symbolet for <a href="/wiki/Temperaturenhed" title="Temperaturenhed">temperaturenheden</a> <a href="/wiki/Kelvin" title="Kelvin">Kelvin</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Udvidelse">Udvidelse</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=3" title="Redigér afsnit: Udvidelse" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=3" title="Edit section's source code: Udvidelse"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Der har været en del forslag om udvidelse af området med præfikser. </p><p>Den daværende fysikstuderende Austin Sendek har foreslået "hella" som præfiks for 10<sup>27</sup>.<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> </p><p>Fysikeren Brian C. Lacki har foreslået at fortsætte i omvendt alfabetisk orden fra Z og Y med symbolerne X, W og V for 10<sup>27</sup>, 10<sup>30</sup> og 10<sup>33</sup>.<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> </p><p>Og så foreslår DigitalDan at bruge "vectra (V)" om 10<sup>27</sup> og "vimto (v)" om 10<sup>-27</sup>.<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-heading2"><h2 id="Oprindelige_metriske_præfikser"><span id="Oprindelige_metriske_pr.C3.A6fikser"></span>Oprindelige metriske præfikser</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=4" title="Redigér afsnit: Oprindelige metriske præfikser" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=4" title="Edit section's source code: Oprindelige metriske præfikser"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>De oprindelige præfikser fra <a href="/wiki/1795" title="1795">1795</a> var: </p> <table class="wikitable" style="background:#FDFDFD"> <tbody><tr style="text-align: center; line-height: 22pt; background:#E8E8E8"> <td><span style="font-size:larger"><b>Præfiks</b></span></td> <td colspan="3"><span style="font-size:larger"><b>Tal</b></span></td> <td colspan="2"><span style="font-size:larger"><b>Etymologi</b></span> </td></tr> <tr style="background:#F5F5F5"> <td><b>Navn</b></td> <td><b>Navn</b></td> <td><b>10<sup>n</sup></b></td> <td><b>Decimaltal</b></td> <td><b>Sprog</b></td> <td><b>Betydning</b> </td></tr> <tr> <td>  <a href="/w/index.php?title=Myria&action=edit&redlink=1" class="new" title="Myria (ikke skrevet endnu)">myria</a></td> <td><a href="/wiki/10.000_(tal)" title="10.000 (tal)">titusind</a></td> <td>10<sup>4</sup></td> <td style="text-align: right">10 000</td> <td rowspan="4">græsk</td> <td>μύριοι, <i>mýrioi</i>, <i>titusind</i> </td></tr> <tr> <td>  kilo</td> <td>tusind</td> <td>10<sup>3</sup></td> <td style="text-align: right">1 000</td> <td>χίλιοι, <i>khilioi</i>, <i>tusind</i> </td></tr> <tr> <td>  hekto</td> <td>hundrede</td> <td>10<sup>2</sup></td> <td style="text-align: right">100</td> <td>ἑκατόν, <i>hekaton</i>, <i>hundrede</i> </td></tr> <tr> <td>  deka</td> <td>ti</td> <td>10<sup>1</sup></td> <td style="text-align: right">10</td> <td>δέκα, <i>deka</i>, <i>ti</i> </td></tr> <tr bgcolor="white"> <td></td> <td>en / et</td> <td>10<sup>0</sup></td> <td style="text-align: center">1</td> <td></td> <td> </td></tr> <tr> <td>  deci</td> <td>tiendedel</td> <td>10<sup>-1</sup></td> <td>0,1</td> <td rowspan="3">latin</td> <td><i>decimus</i>, <i>tiende</i> </td></tr> <tr> <td>  centi</td> <td>hundrededel</td> <td>10<sup>-2</sup></td> <td>0,01</td> <td><i>centum</i>, <i>hundrede</i> </td></tr> <tr> <td>  milli</td> <td>tusindedel</td> <td>10<sup>−3</sup></td> <td>0,001</td> <td><i>mille</i>, <i>tusind</i> </td></tr></tbody></table> <p>Desuden havde man "double" for dobbelt og "demi" for halvt<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>, og man kunne sætte præfikser sammen, f.eks. er et pund et demikilogram. Den franske lov fra 1795 har ikke nogen symboler eller forkortelser for præfiksene.<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> </p><p>Præfiksene "demi", "double" og "myria" er udgået, men enheden en <a href="/wiki/Svensk_mil" title="Svensk mil">myriameter</a> (ti kilometer) har overlevet som en <a href="/wiki/Mil" title="Mil">mil</a> í <a href="/wiki/Norge" title="Norge">Norge</a> og <a href="/wiki/Sverige" title="Sverige">Sverige</a>.<sup id="cite_ref-snl_11-0" class="reference"><a href="#cite_note-snl-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>Præfiksene, der ikke er hele potenser af 1000, altså "hekto", "deka", "deci" og "centi", har begrænset anvendelse. Det er tilladt at skrive 1013 hPa for atmosfæretrykket 101 300 Pa. Derimod må man ikke skrive 101,3 hV for den elektriske spænding 10 130 V, men gerne f.eks. 10,13 kV. </p> <div class="mw-heading mw-heading2"><h2 id="Eksempler">Eksempler</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=5" title="Redigér afsnit: Eksempler" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=5" title="Edit section's source code: Eksempler"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>5 cm = 5 × 10<sup>-2</sup> m = 5 × 0,01 m = 0,05 m</li> <li>3 MW = 3 × 10<sup>6</sup> W = 3 × 1 000 000 W = 3 000 000 W</li></ul> <div class="mw-heading mw-heading2"><h2 id="Operatorpræcedens"><span id="Operatorpr.C3.A6cedens"></span>Operatorpræcedens</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=6" title="Redigér afsnit: Operatorpræcedens" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=6" title="Edit section's source code: Operatorpræcedens"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Præfikset har altid højere <a href="/wiki/Operatorpr%C3%A6cedens" class="mw-redirect" title="Operatorpræcedens">operatorpræcedens</a> end en hvilkensomhelst eksponentiering; derfor betyder <i>km²</i> <i>kvadratkilometer</i> og ikke <i>kilokvadratmeter</i>. For eksempel er 3 km<sup>2</sup> = 3 × (1000 m)<sup>2</sup> = 3 000 000 m<sup>2</sup>. </p> <div class="mw-heading mw-heading2"><h2 id="Anbefalinger">Anbefalinger</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=7" title="Redigér afsnit: Anbefalinger" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=7" title="Edit section's source code: Anbefalinger"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Det anbefales at anvende præfikser med <a href="/wiki/Eksponent" class="mw-redirect" title="Eksponent">eksponenter</a>, der er delelige med tre. Hellere '100 meter' end 'en hektometer'. Bemærkelsesværdige undtagelser er <a href="/wiki/Centimeter" title="Centimeter">centimeter</a>, <a href="/wiki/Hektar" title="Hektar">hektar</a> (hekto-<a href="/wiki/Ar_(enhed)" class="mw-redirect" title="Ar (enhed)">ar</a>), <a href="/w/index.php?title=Centiliter&action=edit&redlink=1" class="new" title="Centiliter (ikke skrevet endnu)">centiliter</a> og 1 dm<sup>3</sup> (det samme som <a href="/wiki/Rumfang" title="Rumfang">rumfanget</a> én <a href="/wiki/Liter" title="Liter">liter</a>). </p> <div class="mw-heading mw-heading2"><h2 id="Navnenes_oprindelse">Navnenes oprindelse</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=8" title="Redigér afsnit: Navnenes oprindelse" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=8" title="Edit section's source code: Navnenes oprindelse"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Af de 20 præfikser er 13 afledt af græsk, fire af latin, to (femto og atto) er afledt af dansk, og et (piko) er afledt af italiensk. </p> <div class="mw-heading mw-heading2"><h2 id="Se_også"><span id="Se_ogs.C3.A5"></span>Se også</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=9" title="Redigér afsnit: Se også" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=9" title="Edit section's source code: Se også"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Bin%C3%A6rt_pr%C3%A6fiks" title="Binært præfiks">Binært præfiks</a>, <a href="/wiki/Danske_enheder" class="mw-redirect" title="Danske enheder">danske enheder</a>, <a href="/wiki/Procent" title="Procent">procent</a>, <a href="/wiki/Promille" title="Promille">promille</a>, <a href="/wiki/Parts_per_million" title="Parts per million">ppm</a>, <a href="/wiki/Parts_per_billion" title="Parts per billion">ppb</a>, <a href="/wiki/Parts_per_trillion" title="Parts per trillion">ppt</a>, <a href="/wiki/SI-enhed" class="mw-redirect" title="SI-enhed">SI-enhed</a>, <a href="/wiki/Navne_p%C3%A5_store_tal" class="mw-redirect" title="Navne på store tal">Navne på store tal</a></li> <li><a href="https://en.wikipedia.org/wiki/Unified_Code_for_Units_of_Measure" class="extiw" title="en:Unified Code for Units of Measure">en:Unified Code for Units of Measure</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Kilder">Kilder</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=SI-pr%C3%A6fiks&veaction=edit&section=10" title="Redigér afsnit: Kilder" class="mw-editsection-visualeditor"><span>redigér</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=SI-pr%C3%A6fiks&action=edit&section=10" title="Edit section's source code: Kilder"><span>rediger kildetekst</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r11780210">.mw-parser-output .reflist{font-size:90%;margin-bottom:0.5em;list-style-type:decimal}.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 mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.bipm.org/en/publications/si-brochure/chapter3.html">SI Brochure - Section 3.1: SI prefixes</a></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.bipm.org/en/publications/si-brochure/">SI Brochure: The International System of Units</a></span> </li> <li id="cite_note-ing2022-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-ing2022_3-0"><sup>a</sup></a> <a href="#cite_ref-ing2022_3-1"><sup>b</sup></a> <a href="#cite_ref-ing2022_3-2"><sup>c</sup></a> <a href="#cite_ref-ing2022_3-3"><sup>d</sup></a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://ing.dk/artikel/vaerd-at-vide-sig-goddag-ronna-quetta-farvel-skudsekunder-262790">16. nov 2022, ing.dk: Værd at Vide: Sig goddag til ronna og quetta og farvel til skudsekunder</a> Citat: "...Tiden er kommet til at definere nye navne for 10^27 og 10^30 og tage et afgørende skridt i retning af at bandlyse skudsekunder de næste 100 år...De foreslåede navne er hhv. ronna/ronto og quetta/quecto. Disse er hhv. inspireret af novem (latin for ni) og decem (latin for ti). Navnene er valgt, så deres forkortelser R/r og Q/q ikke allerede er taget i brug for SI-enheder eller andre ofte brugte enheder eller symboler...", <a rel="nofollow" class="external text" href="https://web.archive.org/web/20221120215517/https://ing.dk/artikel/vaerd-at-vide-sig-goddag-ronna-quetta-farvel-skudsekunder-262790/">backup</a></span> </li> <li id="cite_note-ns2022-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-ns2022_4-0"><sup>a</sup></a> <a href="#cite_ref-ns2022_4-1"><sup>b</sup></a> <a href="#cite_ref-ns2022_4-2"><sup>c</sup></a> <a href="#cite_ref-ns2022_4-3"><sup>d</sup></a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.newscientist.com/article/2347426-ronnametres-and-quettagrams-have-joined-the-ranks-of-si-units/">18 November 2022, newscientist.com: </a> Citat: "...New prefixes in the International System of Units have been confirmed, ushering in ronto and quecto for tiny numbers and ronna and quetta for very large numbers, like the amount of data on internet servers...", <a rel="nofollow" class="external text" href="https://web.archive.org/web/20221120214940/https://www.newscientist.com/article/2347426-ronnametres-and-quettagrams-have-joined-the-ranks-of-si-units/">backup</a></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.biodiversitylibrary.org/item/94452#page/324/mode/1up">British Association for the Advancement of Science: Report 1873, Page 224</a></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://articles.latimes.com/2010/jul/06/local/la-me-hella-20100706">Physics major has a name for a really big number, Los Angeles Times 6. juli 2010</a></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://arxiv.org/pdf/1503.01509.pdf">Lacki, B. C. (2015). SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers</a></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><a href="#cite_ref-8">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.digitaldan.co.uk/scie/phys3.php">DigitalDan's Scientific Website - SI Prefixes</a></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><a href="#cite_ref-9">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://histoire.du.metre.free.fr/fr/index.htm">L'Histoire Du Mètre: La Loi Du 18 Germinal An 3</a></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><a href="#cite_ref-10">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://histoire.du.metre.free.fr/en/index.htm">The History of the Meter - The 7 April 1795 Act - Art. 6, 7 & 8</a></span> </li> <li id="cite_note-snl-11"><span class="mw-cite-backlink"><a href="#cite_ref-snl_11-0">^</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://snl.no/mil">Store norske leksikon: Mil</a></span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r11759279">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist 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rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r11759279" /><style data-mw-deduplicate="TemplateStyles:r11746895">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar 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}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-vis"><a href="/wiki/Skabelon:SI-enheder" title="Skabelon:SI-enheder"><abbr title="Se denne skabelon" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">v</abbr></a></li><li class="nv-diskussion"><a href="/wiki/Skabelondiskussion:SI-enheder" title="Skabelondiskussion:SI-enheder"><abbr title="Diskuter denne skabelon" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">d</abbr></a></li><li class="nv-rediger"><a href="/wiki/Speciel:EditPage/Skabelon:SI-enheder" title="Speciel:EditPage/Skabelon:SI-enheder"><abbr title="Rediger denne skabelon" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">r</abbr></a></li></ul></div><div id="SI-systemet" style="font-size:114%;margin:0 4em"><a href="/wiki/Syst%C3%A8me_International_d%27Unit%C3%A9s" class="mw-redirect" title="Système International d'Unités">SI-systemet</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Grundl%C3%A6ggende_SI-enheder" title="Grundlæggende SI-enheder">Grundlæggende SI-enheder</a></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="/wiki/Ampere" title="Ampere">ampere</a></li> <li><a href="/wiki/Candela" title="Candela">candela</a></li> <li><a href="/wiki/Kelvin" title="Kelvin">kelvin</a></li> <li><a href="/wiki/Kilogram" title="Kilogram">kilogram</a></li> <li><a href="/wiki/Meter" title="Meter">meter</a></li> <li><a href="/wiki/Mol_(enhed)" title="Mol (enhed)">mol</a></li> <li><a href="/wiki/Sekund" title="Sekund">sekund</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="4" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/Fil:SI_base_units.svg" class="mw-file-description" title="Grundlæggende SI-enheder"><img alt="Grundlæggende SI-enheder" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/SI_base_units.svg/125px-SI_base_units.svg.png" decoding="async" width="125" height="125" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/SI_base_units.svg/188px-SI_base_units.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/SI_base_units.svg/250px-SI_base_units.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Afledte_SI-enheder" title="Afledte SI-enheder">Afledte SI-enheder</a></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="/wiki/Becquerel" title="Becquerel">becquerel</a></li> <li><a href="/wiki/Coulomb" title="Coulomb">coulomb</a></li> <li><a href="/wiki/Celsius" title="Celsius">grader Celsius</a></li> <li><a href="/wiki/Farad" title="Farad">farad</a></li> <li><a href="/wiki/Gray" title="Gray">gray</a></li> <li><a href="/wiki/Henry_(enhed)" title="Henry (enhed)">henry</a></li> <li><a href="/wiki/Hertz" title="Hertz">hertz</a></li> <li><a href="/wiki/Joule" title="Joule">joule</a></li> <li><a href="/wiki/Katal" title="Katal">katal</a></li> <li><a href="/wiki/Lumen" title="Lumen">lumen</a></li> <li><a href="/wiki/Lux" title="Lux">lux</a></li> <li><a href="/wiki/Newton_(enhed)" title="Newton (enhed)">newton</a></li> <li><a href="/wiki/Ohm" title="Ohm">ohm</a></li> <li><a href="/wiki/Pascal_(enhed)" title="Pascal (enhed)">pascal</a></li> <li><a href="/wiki/Radian" title="Radian">radian</a></li> <li><a href="/wiki/Siemens_(ledningsevneenhed)" title="Siemens (ledningsevneenhed)">siemens</a></li> <li><a href="/wiki/Sievert" title="Sievert">sievert</a></li> <li><a href="/wiki/Steradian" title="Steradian">steradian</a></li> <li><a href="/wiki/Tesla" title="Tesla">tesla</a></li> <li><a href="/wiki/Volt" title="Volt">volt</a></li> <li><a href="/wiki/Watt" title="Watt">watt</a></li> <li><a href="/wiki/Weber" title="Weber">weber</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Andre accepterede enheder</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="/wiki/Astronomisk_enhed" title="Astronomisk enhed">astronomisk enhed</a></li> <li><a href="/wiki/Atommasseenhed" title="Atommasseenhed">atommasseenhed</a></li> <li><a href="/wiki/Bueminut" title="Bueminut">bueminut</a></li> <li><a href="/wiki/Buesekund" title="Buesekund">buesekund</a></li> <li><a href="/wiki/Dag" title="Dag">dag</a></li> <li><a href="/wiki/Dalton_(kemisk_enhed)" class="mw-redirect" title="Dalton (kemisk enhed)">dalton</a></li> <li><a href="/wiki/Bel_(enhed)" title="Bel (enhed)">decibel</a></li> <li><a href="/wiki/Elektronvolt" title="Elektronvolt">elektronvolt</a></li> <li><a href="/wiki/Grad_(vinkelm%C3%A5l)" title="Grad (vinkelmål)">grad (vinkelmål)</a></li> <li><a href="/wiki/Hektar" title="Hektar">hektar</a></li> <li><a href="/wiki/Knob_(fart)" title="Knob (fart)">knob</a></li> <li><a href="/wiki/Liter" title="Liter">liter</a></li> <li><a href="/wiki/Minut" title="Minut">minut</a></li> <li><a href="/wiki/Neper" title="Neper">neper</a></li> <li><a href="/wiki/International_s%C3%B8mil" title="International sømil">sømil</a></li> <li><a href="/wiki/Time" title="Time">time</a></li> <li><a href="/wiki/Ton" title="Ton">ton</a></li> <li><a href="/w/index.php?title=Naturlige_enheder&action=edit&redlink=1" class="new" title="Naturlige enheder (ikke skrevet endnu)">naturlige enheder</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Se også</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 class="mw-selflink selflink">SI-præfiks</a></li></ul> </div></td></tr></tbody></table></div>    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