Office of Weights and Measures

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</div> </div> </div> </div> </div> </div> <div class="grid-container margin-top-4"> <div class="grid-row grid-gap-6"> <aside class="nist-page__region nist-page__region--sidebar-first tablet-lg:grid-col-4 desktop-lg:grid-col-3"> <div>  <div data-elastic-exclude="" class="nist-block" > <nav> <ul class="usa-sidenav usa-accordion "> <li class="usa-sidenav__item"> <a href="/pml" data-drupal-link-system-path="">Laboratory Homepage</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm" data-drupal-link-system-path="">Division Homepage</a> </li> <li class="usa-sidenav__item usa-sidenav__item--parent"> <a href="/pml/owm/about-us" data-drupal-link-system-path="">About OWM</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-3"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-3" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a 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aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-7"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-7" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/pml/owm/international-legal-metrology" data-drupal-link-system-path="">International Legal Metrology</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-7-1"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-7-1" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/pml/owm/international-legal-metrology/documentary-standards" data-drupal-link-system-path="">Documentary Standards</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/international-legal-metrology/glossary-acronyms" data-drupal-link-system-path="">Glossary of Acronyms</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/international-legal-metrology/ilmp-organizational-primer" data-drupal-link-system-path="">ILMP Organizational Primer</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/international-legal-metrology/national-metrology-systems" data-drupal-link-system-path="">National Metrology Systems</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/international-legal-metrology/oiml-resources" data-drupal-link-system-path="">OIML Resources</a> </li> </ul> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/laboratory-metrology" data-drupal-link-system-path="">Laboratory Metrology</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-7-2"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-7-2" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/pml/owm/laboratory-metrology/metrology-training" data-drupal-link-system-path="">Metrology Training</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/laboratory-metrology/proficiency-testing-pt" data-drupal-link-system-path="">Proficiency Testing (PT)</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/laboratory-metrology/laboratory-recognition" data-drupal-link-system-path="">Laboratory Recognition</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/laboratory-metrology/documentary-standards-and-resources" data-drupal-link-system-path="">Documentary Standards and Resources</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-7-2-4"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-7-2-4" class="usa-sidenav__sublist"> <li> <a href="/pml/owm/laboratory-metrology/documentary-standards-and-resources/calibration-procedures" data-drupal-link-system-path="">Calibration Procedures</a> </li> <li> <a href="/pml/owm/laboratory-metrology/documentary-standards-and-resources/glps" data-drupal-link-system-path="">GLPs</a> </li> <li> <a href="/pml/owm/laboratory-metrology/documentary-standards-and-resources/gmps" data-drupal-link-system-path="">GMPs</a> </li> <li> <a href="/pml/owm/laboratory-metrology/documentary-standards-and-resources/recognition" data-drupal-link-system-path="">Recognition</a> </li> <li> <a href="/pml/owm/laboratory-metrology/documentary-standards-and-resources/ojt-and-mentoring" data-drupal-link-system-path="">OJT and Mentoring</a> </li> <li> <a href="/pml/owm/laboratory-metrology/documentary-standards-and-resources/sops" data-drupal-link-system-path="">SOPs</a> </li> </ul> </li> </ul> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si" data-drupal-link-system-path="">Metric (SI)</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-7-3"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-7-3" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/us-metrication" data-drupal-link-system-path="">U.S. Metrication</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/si-units" data-drupal-link-system-path="">SI Units</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/understanding-metric" data-drupal-link-system-path="">Understanding Metric</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/everyday-metric" data-drupal-link-system-path="">Everyday with Metric</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/metric-kitchen" data-drupal-link-system-path="">Metric Kitchen</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/si-education-training" data-drupal-link-system-path="">SI Education & Training</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/unit-conversion" data-drupal-link-system-path="">Unit Conversion</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/metric-si/metric-policy" data-drupal-link-system-path="">Metric Policy</a> </li> </ul> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/national-legal-metrology" data-drupal-link-system-path="">National Legal Metrology</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-7-4"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-7-4" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/pml/owm/laws-and-regulations/laws-and-regulations-resources" data-drupal-link-system-path="">Laws and Regulations Resources</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/laws-and-regulations/fuels-and-lubricants-subcommittee-fals" data-drupal-link-system-path="">Fuels and Lubricants Subcommittee (FALS)</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/owm-products-and-services/e-learning-resources" data-drupal-link-system-path="">Legal Devices Training Materials</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/national-legal-metrology/price-verification" data-drupal-link-system-path="">Price Verification</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/laws-and-regulations/precious-metals-conversion" data-drupal-link-system-path="">Precious Metals Conversion</a> </li> <li class="usa-sidenav__item"> <a href="https://www.nist.gov/pml/owm/packaging-and-labeling" data-drupal-link-system-path="">Packaging and Labeling</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/owm-products-and-services/national-working-groups" data-drupal-link-system-path="">U.S. National Working Groups</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/national-legal-metrology/us-retail-pricing-laws-and-regulations" data-drupal-link-system-path="">U.S. Retail Pricing Laws and Regulations</a> </li> </ul> </li> </ul> </li> <li class="usa-sidenav__item usa-sidenav__item--parent"> <a href="/pml/owm/resources-weights-and-measures" data-drupal-link-system-path="">Resources for Weights and Measures</a> <button class="usa-accordion__button" aria-expanded="false" aria-controls="menu-office-of-weights-and-measu-8"><span class="usa-sr-only">Expand or Collapse</span></button> <ul id="menu-office-of-weights-and-measu-8" class="usa-sidenav__sublist usa-accordion"> <li class="usa-sidenav__item"> <a href="/pml/owm/resources-weights-and-measures/weights-and-measures-news" data-drupal-link-system-path="">Weights and Measures in the News</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/resources-weights-and-measures/state-weights-and-measures-directors" data-drupal-link-system-path="">State Weights and Measures Directors</a> </li> <li class="usa-sidenav__item"> <a href="/pml/owm/resources-weights-and-measures/state-metrology-laboratories" data-drupal-link-system-path="">State Metrology Laboratories</a> </li> <li class="usa-sidenav__item"> <a href="https://www.nist.gov/document/us-wm-and-metrologist-directory" data-drupal-link-system-path="">U.S. W&M and Metrologist Directory</a> </li> <li class="usa-sidenav__item"> <a href="https://www.ncwm.com/" data-drupal-link-system-path="">National Council on Weights and Measures (NCWM)</a> </li> <li class="usa-sidenav__item"> <a href="https://www.ncwm.com/ntep-about" data-drupal-link-system-path="">National Type Evaluation Program (NTEP)</a> </li> <li class="usa-sidenav__item"> <a href="https://www.oiml.org/en" data-drupal-link-system-path="">International Organization of Legal Metrology (OIML)</a> </li> </ul> </li> </ul> </nav> </div>   <div class="views-element-container nist-block nist-block--org" data-elastic-exclude="" > <h2 class="nist-block__title" >Groups</h2> <div><div class="js-view-dom-id-f1aac038938ff82b214653bcd72f86a246da9d13940ccb605a741660209f1b33"> <div class="link-list"> <ul> <li><div class="views-field views-field-title-1"><span class="field-content"><a href="/pml/owm/international-legal-metrology" hreflang="en">International Legal Metrology</a></span></div></li> <li><div class="views-field views-field-title-1"><span class="field-content"><a href="/pml/owm/laboratory-metrology" hreflang="en">Laboratory Metrology</a></span></div></li> <li><div class="views-field views-field-title-1"><span class="field-content"><a href="/pml/owm/metric-si" hreflang="en">Metric (SI) Program</a></span></div></li> <li><div class="views-field views-field-title-1"><span class="field-content"><a href="/pml/owm/national-legal-metrology" hreflang="en">National Legal Metrology</a></span></div></li> </ul> </div> </div> </div> </div>  </div> </aside> <div class="nist-page__region nist-page__region--content tablet-lg:grid-col-8 desktop-lg:grid-col-9" > <div class="nist-block" > <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/pml/owm/weights-and-measures-week"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2025/02/28/owm-weights-and-measures-week-hero.png.webp?itok=egQ2B_FM 1x, /sites/default/files/styles/1200w_x_720h/public/images/2025/02/28/owm-weights-and-measures-week-hero.png.webp?itok=zkGW8LRD 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2025/02/28/owm-weights-and-measures-week-hero.png.webp?itok=Xz58oZQ3 1x, /sites/default/files/styles/600w_x_360h/public/images/2025/02/28/owm-weights-and-measures-week-hero.png.webp?itok=egQ2B_FM 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2025/02/28/owm-weights-and-measures-week-hero.png.jpg?itok=egQ2B_FM" width="600" height="360" alt="Weights and Measures Week" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/pml/owm/weights-and-measures-week"> <div class="text">2025 National Weights and Measures Week</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/pml/owm/weights-and-measures-economic-index"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2025/02/10/owm-economic-impact-hero-2025-02.png.webp?itok=Ur93R5v6 1x, /sites/default/files/styles/1200w_x_720h/public/images/2025/02/10/owm-economic-impact-hero-2025-02.png.webp?itok=C1CWj2ci 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2025/02/10/owm-economic-impact-hero-2025-02.png.webp?itok=IGJ2ccu1 1x, /sites/default/files/styles/600w_x_360h/public/images/2025/02/10/owm-economic-impact-hero-2025-02.png.webp?itok=Ur93R5v6 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2025/02/10/owm-economic-impact-hero-2025-02.png.jpg?itok=Ur93R5v6" width="600" height="360" alt="OWM economic impact hero" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/pml/owm/weights-and-measures-economic-index"> <div class="text">Weights and Measures Support Nearly Half of U.S. GDP</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 "> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/news-events/news/2025/01/announcing-2025-nist-owm-info-hours-series"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2025/03/17/owm-info-hours-announcement-banner.png.webp?itok=1j11GU8M 1x, /sites/default/files/styles/1200w_x_720h/public/images/2025/03/17/owm-info-hours-announcement-banner.png.webp?itok=DOgK1o5C 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2025/03/17/owm-info-hours-announcement-banner.png.webp?itok=YxXXIdiM 1x, /sites/default/files/styles/600w_x_360h/public/images/2025/03/17/owm-info-hours-announcement-banner.png.webp?itok=1j11GU8M 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2025/03/17/owm-info-hours-announcement-banner.png.jpg?itok=1j11GU8M" width="600" height="360" alt="OWM Info Hours Announcement Banner" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/news-events/news/2025/01/announcing-2025-nist-owm-info-hours-series"> <div class="text">Register now for the 2025 Info Hours!</div> </a> </div> </div> </div> </div> </div> <div class="nist-content-row nist-content-row--width-legible paragraph paragraph--type--text paragraph--view-mode--default"> <div class="nist-block text-long"><div class="OutlineElement Ltr SCXW216710491 BCX2"><div class="OutlineElement Ltr SCXW115286206 BCX2"><p>The NIST Office of Weights and Measures (OWM) works to ensure that consumers get what they pay for and sellers get fair payment for the goods and services they sell by promoting a uniform and technically sound system of weights and measures. This, in turn, promotes consumer confidence and helps ensure fair competition for U.S. commerce that spans from local business operations to a global scale. </p><p>See<a href="/pml/owm/about-owm/owm-background-and-history" title="About OWM" data-entity-type="node" data-entity-uuid="59dcbc3d-d5dd-4535-bb40-c3935f4652b8" data-entity-substitution="canonical"> <strong>About OWM</strong></a><span><strong> </strong>and </span><a href="/news-events/news/2024/10/dyk-nist-owm-fun-facts" data-entity-type="node" data-entity-uuid="df8481c1-98a8-4bc7-b6cf-85897630671c" data-entity-substitution="canonical" title="DYK: NIST OWM Fun Facts"><span><strong>OWM Fun Facts</strong></span></a><span> to learn more about our programs, history, and unique </span><a href="/pml/owm/about-owm/owm-responsibilities-and-authorities" data-entity-type="node" data-entity-uuid="ee976bd0-4ff9-446c-9288-01589b85e20e" data-entity-substitution="canonical" title="OWM Responsibilities and Authorities"><span><strong>Responsibilities and Authorities</strong></span></a><span>.</span></p><h2 class="nist-block__title">OWM Quick Start: Find It Here!</h2></div></div></div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-4 nist-hero__item--overlay"> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/pml/owm/owm-products-and-services/publications-and-documentary-standards"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2024/12/26/document%20download%20icon_0.png.webp?itok=FnRS9iRB 1x, /sites/default/files/styles/1200w_x_720h/public/images/2024/12/26/document%20download%20icon_0.png.webp?itok=ltpAWLMS 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2024/12/26/document%20download%20icon_0.png.webp?itok=UEjh-suu 1x, /sites/default/files/styles/600w_x_360h/public/images/2024/12/26/document%20download%20icon_0.png.webp?itok=FnRS9iRB 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2024/12/26/document%20download%20icon_0.png.jpg?itok=FnRS9iRB" width="600" height="360" alt="document download icon" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/pml/owm/owm-products-and-services/publications-and-documentary-standards"> <div class="text">PUBLICATIONS AND DOCUMENTARY STANDARDS</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 nist-hero__item--overlay"> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/pml/owm/owm-training-and-events"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2024/12/26/2025%20calendar%20icon_0.png.webp?itok=rlkc0ARd 1x, /sites/default/files/styles/1200w_x_720h/public/images/2024/12/26/2025%20calendar%20icon_0.png.webp?itok=uIvq99lR 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2024/12/26/2025%20calendar%20icon_0.png.webp?itok=CPDXoahO 1x, /sites/default/files/styles/600w_x_360h/public/images/2024/12/26/2025%20calendar%20icon_0.png.webp?itok=rlkc0ARd 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2024/12/26/2025%20calendar%20icon_0.png.jpg?itok=rlkc0ARd" width="600" height="360" alt="2025 calendar icon" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/pml/owm/owm-training-and-events"> <div class="text">TRAINING COURSES AND EVENTS</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 nist-hero__item--overlay"> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/pml/owm/owm-products-and-services/e-learning-resources"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2024/12/23/e-learning%20icon2.png.webp?itok=MQ0wYZ8s 1x, /sites/default/files/styles/1200w_x_720h/public/images/2024/12/23/e-learning%20icon2.png.webp?itok=m3WmoyW9 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2024/12/23/e-learning%20icon2.png.webp?itok=yel-8gRt 1x, /sites/default/files/styles/600w_x_360h/public/images/2024/12/23/e-learning%20icon2.png.webp?itok=MQ0wYZ8s 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2024/12/23/e-learning%20icon2.png.jpg?itok=MQ0wYZ8s" width="600" height="360" alt="icon of e-learning" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/pml/owm/owm-products-and-services/e-learning-resources"> <div class="text">E-LEARNING RESOURCES</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--hero paragraph--view-mode--default"> <div class="nist-hero grid-row grid-gap-2"> <div class="nist-hero__item tablet:grid-col-4 nist-hero__item--overlay"> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="https://owm.nist.gov/s/"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2024/12/14/Icon%20for%20contact%20system.png.webp?itok=rifs_zue 1x, /sites/default/files/styles/1200w_x_720h/public/images/2024/12/14/Icon%20for%20contact%20system.png.webp?itok=PA3XzPP7 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2024/12/14/Icon%20for%20contact%20system.png.webp?itok=fABanZIb 1x, /sites/default/files/styles/600w_x_360h/public/images/2024/12/14/Icon%20for%20contact%20system.png.webp?itok=rifs_zue 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2024/12/14/Icon%20for%20contact%20system.png.jpg?itok=rifs_zue" width="600" height="360" alt="Icon for OWM Contact System" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="https://owm.nist.gov/s/"> <div class="text">OWM CONTACTS SYSTEM</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 nist-hero__item--overlay"> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/pml/owm/metric-si"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2024/12/17/SI%20Illustration%20Black%20Full.jpg.webp?itok=vJsF_BLQ 1x, /sites/default/files/styles/1200w_x_720h/public/images/2024/12/17/SI%20Illustration%20Black%20Full.jpg.webp?itok=xPnnO4VX 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2024/12/17/SI%20Illustration%20Black%20Full.jpg.webp?itok=DSTifpvy 1x, /sites/default/files/styles/600w_x_360h/public/images/2024/12/17/SI%20Illustration%20Black%20Full.jpg.webp?itok=vJsF_BLQ 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2024/12/17/SI%20Illustration%20Black%20Full.jpg.jpg?itok=vJsF_BLQ" width="600" height="360" alt="SI wheel in black and white" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/pml/owm/metric-si"> <div class="text">METRIC (SI) PROGRAM</div> </a> </div> </div> </div> <div class="nist-hero__item tablet:grid-col-4 nist-hero__item--overlay"> <div class="nist-hero__item-inner"> <div class="nist-hero__image"> <a href="/pml/owm/faqs"> <picture> <source srcset="/sites/default/files/styles/600w_x_360h/public/images/2024/12/18/question%20mark%20icon_0.png.webp?itok=yAa1pBWo 1x, /sites/default/files/styles/1200w_x_720h/public/images/2024/12/18/question%20mark%20icon_0.png.webp?itok=43w5F2-K 2x" media="(min-width: 480px)" type="image/webp" width="600" height="360"/> <source srcset="/sites/default/files/styles/300w_x_180h/public/images/2024/12/18/question%20mark%20icon_0.png.webp?itok=v08mT7X1 1x, /sites/default/files/styles/600w_x_360h/public/images/2024/12/18/question%20mark%20icon_0.png.webp?itok=yAa1pBWo 2x" media="(min-width: 0px)" type="image/webp" width="300" height="180"/> <img loading="eager" src="/sites/default/files/styles/600w_x_360h/public/images/2024/12/18/question%20mark%20icon_0.png.jpg?itok=yAa1pBWo" width="600" height="360" alt="question mark icon" typeof="foaf:Image" /> </picture> </a> </div> <div class="nist-hero__caption"> <a href="/pml/owm/faqs"> <div class="text">OWM FAQS</div> </a> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--dynamic-content-list-ou paragraph--view-mode--default"> <div class="nist-block " > <h2 class="nist-block__title" > <div class="string">Projects and Programs</div> </h2> <div class="viewsreference"><div class="views-element-container"><div class="js-view-dom-id-ed3e251ba5bb0c97f185c7669b13c12995b70a320861590efded36555a13bd95"> <div> <article about="/programs-projects/electric-vehicle-supply-equipment-evse-program-standards-services-and-training" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/programs-projects/electric-vehicle-supply-equipment-evse-program-standards-services-and-training" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2023/08/14/Parked%20Electric%20Vehicles%20Charging.png?itok=BKDoNKKi" width="100" height="61" alt=" Public parking along the street with charging points for electric vehicles" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/programs-projects/electric-vehicle-supply-equipment-evse-program-standards-services-and-training"><span>Electric Vehicle Supply Equipment (EVSE) Program: Standards, Services, and Training</span> </a></h3> <div class="nist-teaser__type"> <div class="nist-badge display-inline-block margin-y-1 nist-badge--blue list-string">Ongoing</div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> Weights and measures authorities in each U.S. state and local jurisdiction are responsible for the testing and official inspection of electric vehicle (EV) chargers, specifically the measurement devices that deliver electricity as fuel within commercial EV chargers. These devices are commonly </div> </div> </div> </article> </div> <div> <article about="/programs-projects/nist-owm-ncwm-enduring-partnership" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/programs-projects/nist-owm-ncwm-enduring-partnership" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/01/07/OWM%20NCWM%20Group%20Photo.png?itok=QK7ocIbA" width="100" height="69" alt="group photo taken at NCWM 2023 Annual Meeting; Craig VanBuren, Don Onwiler, and Mahesh Albuquerque of NCWM, Laurie Locascio and Katrice Lippa of NIST, Gene Robertson of NCWM, David Sefcik" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/programs-projects/nist-owm-ncwm-enduring-partnership"><span>NIST OWM – NCWM: An Enduring Partnership</span> </a></h3> <div class="nist-teaser__type"> <div class="nist-badge display-inline-block margin-y-1 nist-badge--blue list-string">Ongoing</div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> The National Conference on Weights and Measures (NCWM) was first held as the “First Annual Meeting of Sealers of Weights and Measures of the United States” in 1905 and as part of the National Bureau of Standards (NBS), which was the predecessor non-regulatory agency to the National Institute of </div> </div> </div> </article> </div> <div> <article about="/programs-projects/owm-training-program-metrology-metrication-and-more" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/programs-projects/owm-training-program-metrology-metrication-and-more" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/02/18/owm-lab-metrology-training-mass-20241030-DSC_6495-whitman.jpg?itok=3gl6iKBA" width="100" height="67" alt="OWM Laboratory Metrology Training for mass metrology" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/programs-projects/owm-training-program-metrology-metrication-and-more"><span>OWM Training Program: Metrology, Metrication, and More!</span> </a></h3> <div class="nist-teaser__type"> <div class="nist-badge display-inline-block margin-y-1 nist-badge--blue list-string">Ongoing</div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> OWM offers a variety of in-person, online, and "blended" training classes and materials that provide guidance instruction on national legal metrology standards, weights and measures field inspection procedures, and laws and regulations related to packaging and labeling. OWM provides technical </div> </div> </div> </article> </div> <div> <article about="/programs-projects/regional-measurement-assurance-program-rmap-training-states-across-us" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/programs-projects/regional-measurement-assurance-program-rmap-training-states-across-us" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/02/18/RMAP_STATE_LIST_LRG.png?itok=kaH3KC0E" width="100" height="76" alt="Map of RMAP regions" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/programs-projects/regional-measurement-assurance-program-rmap-training-states-across-us"><span>Regional Measurement Assurance Program (RMAP): Training for the States Across the U.S.</span> </a></h3> <div class="nist-teaser__type"> <div class="nist-badge display-inline-block margin-y-1 nist-badge--blue list-string">Ongoing</div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> The Laboratory Metrology Regional Measurement Assurance Program (RMAP) operates within the broader OWM's Training Program and is integral to the successful training of the U.S. state legal metrology laboratory network and the weights and measures community. Each year, OWM laboratory metrology staff </div> </div> </div> </article> </div> <footer> <div class="link-list"><a href="/laboratories/projects-programs/org/6436">View All Projects/Programs</a></div> </footer> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--tagged-content-list paragraph--view-mode--default"> <div class="nist-block " > <h2 class="nist-block__title" > <div class="string">Blogs</div> </h2> <div class="views-element-container"><div class="js-view-dom-id-627ab25952c25e0c96b77560fa72547b0f8b45049d4da731f2980c3c08c44a94"> <div> <article about="/blogs/taking-measure/weighing-your-purchases-how-new-laws-may-help-you-become-savvier-online-shopper" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/blogs/taking-measure/weighing-your-purchases-how-new-laws-may-help-you-become-savvier-online-shopper" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2024/02/07/shutterstock_736488079.jpg?itok=lUjjKBJ8" width="100" height="56" alt="Fisheye view of grocery store shelves packed with coffee products." typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/blogs/taking-measure/weighing-your-purchases-how-new-laws-may-help-you-become-savvier-online-shopper"><span>Weighing Your Purchases: How New Laws May Help You Become a Savvier Online Shopper</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2024-03-01T12:00:00Z">March 1, 2024</time> </div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> When you buy something by weight or volume, you want to get what you pay for. And we’re helping to make sure that happens — whether you shop online or in a </div> </div> </div> </article> </div> <div> <article about="/blogs/taking-measure/4-places-weights-and-measures-help-you-get-what-you-pay" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/blogs/taking-measure/4-places-weights-and-measures-help-you-get-what-you-pay" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2023/02/28/weights%20and%20measures%20week%202023%20graphic.png?itok=2qx0ELS3" width="100" height="63" alt="Graphic with text that reads "Weights and Measures" and shows fish at a seafood counter, a bag of mulch, a grocery checkout, and a gas pump. Color scheme is orange and purple. " typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/blogs/taking-measure/4-places-weights-and-measures-help-you-get-what-you-pay"><span>4 Places Weights and Measures Help You Get What You Pay For</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2023-03-01T12:00:00Z">March 1, 2023</time> </div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> Here at NIST, we are committed to making sure you get what you pay for when buying something based on weight or measure, such as food or fuel. </div> </div> </div> </article> </div> <div> <article about="/blogs/taking-measure/us-weights-and-measures-week-measuring-new-normal" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/blogs/taking-measure/us-weights-and-measures-week-measuring-new-normal" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2021/03/03/WeightsandMeasuresWeek_960x600-01.png?itok=NQBz8RHl" width="100" height="63" alt="representation of weights and measures at a packaging plant, a manufacturing plant and a supermarket. " typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/blogs/taking-measure/us-weights-and-measures-week-measuring-new-normal"><span>U.S. Weights and Measures Week: Measuring Up to the New Normal</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2021-03-04T12:00:00Z">March 4, 2021</time> </div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> Each year during national Weights and Measures Week (March 1 to 7), we celebrate the contributions made by the weights and measures community to ensure accuracy </div> </div> </div> </article> </div> <div> <article about="/blogs/taking-measure/busting-myths-about-metric-system" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/blogs/taking-measure/busting-myths-about-metric-system" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2017/09/19/DSC_7077-edited.jpg?itok=bDR9KQKt" width="100" height="100" alt="Elizabeth Gentry holding a kilogram test weight in the weights and measures training lab" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/blogs/taking-measure/busting-myths-about-metric-system"><span>Busting Myths about the Metric System</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2020-10-06T12:00:00Z">October 6, 2020</time> </div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> This year will be the 45th anniversary of the Metric Conversion Act, which was signed on December 23, 1975, by President Gerald R. Ford. Normally, we celebrate </div> </div> </div> </article> </div> <footer> <div class="link-list"><a href="/blogs/tag/2733437">View All Blogs</a></div> </footer> </div> </div> </div> </div> <div class="paragraph paragraph--type--dynamic-content-list-ou paragraph--view-mode--default"> <div class="nist-block " > <h2 class="nist-block__title" > <div class="string">Newsletter Articles and Updates</div> </h2> <div class="viewsreference"><div class="views-element-container"><div class="js-view-dom-id-18acc09226c9e55dbb3d38dd388e12b0d3bdea232e6f71d3f02eaf60ef213d88"> <div> <article about="/news-events/news/2025/03/owm-welcomes-undergraduate-researchers" typeof="schema:Article" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/news/2025/03/owm-welcomes-undergraduate-researchers" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/03/26/thwel-yoon-intern-owm-2025-03.jpg?itok=caHpRAQW" width="100" height="56" alt="Yoon using Printer" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/news-events/news/2025/03/owm-welcomes-undergraduate-researchers"><span property="schema:name">OWM Welcomes Undergraduate Researchers</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2025-03-27T12:00:00Z">March 27, 2025</time> </div> </div> </header> <div class="nist-teaser__content"> <div property="schema:text" class="text-with-summary"> The Office of Weights and Measures (OWM) welcomes Yoon Thwel, a spring Professional Research Experience Program (PREP) intern and Matthew Kenzinger, a visiting </div> </div> </div> </article> </div> <div> <article about="/news-events/news/2025/01/announcing-2025-nist-owm-info-hours-series" typeof="schema:Article" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/news/2025/01/announcing-2025-nist-owm-info-hours-series" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/03/03/owm-info-hours-hero-2025-03.png?itok=pS-Ou6gp" width="100" height="56" alt="OWM Info Hours 2025 sessions" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/news-events/news/2025/01/announcing-2025-nist-owm-info-hours-series"><span property="schema:name">Announcing the 2025 NIST OWM “Info Hours” Series</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2025-01-08T12:00:00Z">January 8, 2025</time> </div> </div> </header> <div class="nist-teaser__content"> <div property="schema:text" class="text-with-summary"> The NIST Office of Weights and Measures (OWM) is pleased to announce the schedule for the 2025 Info Hours series. An Info Hour is a one-hour session that </div> </div> </div> </article> </div> <div> <article about="/news-events/news/2025/01/legal-metrology-maintaining-our-trust-measurements" typeof="schema:Article" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/news/2025/01/legal-metrology-maintaining-our-trust-measurements" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2024/12/10/AdobeStock_199571929.jpeg?itok=KFQhpHBW" width="100" height="56" alt="Trust word as symbol in chrome chain " typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/news-events/news/2025/01/legal-metrology-maintaining-our-trust-measurements"><span property="schema:name">Legal Metrology: Maintaining Our Trust in Measurements</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2025-01-08T12:00:00Z">January 8, 2025</time> </div> </div> </header> <div class="nist-teaser__content"> <div property="schema:text" class="text-with-summary"> Without realizing it, metrology and its associated standards and services play a big role in our daily lives. We buy groceries that are weighed or measured </div> </div> </div> </article> </div> <div> <article about="/news-events/news/2025/01/owm-completes-pilot-test-blended-course-retail-motor-fuel-dispensers" typeof="schema:Article" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/news/2025/01/owm-completes-pilot-test-blended-course-retail-motor-fuel-dispensers" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/01/07/Figure%206.%20RMFD%20Blended%20Class-Group%20Photo.jpg?itok=HhroxcEF" width="100" height="79" alt="RMFD Blended Class Group Photo" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/news-events/news/2025/01/owm-completes-pilot-test-blended-course-retail-motor-fuel-dispensers"><span property="schema:name">OWM Completes Pilot Test of a “Blended” Course on Retail Motor-Fuel Dispensers</span> </a></h3> <div class="nist-teaser__date"> <div class="daterange"><time datetime="2025-01-07T12:00:00Z">January 7, 2025</time> </div> </div> </header> <div class="nist-teaser__content"> <div property="schema:text" class="text-with-summary"> In October 2024, NIST OWM completed a pilot test of a “blended” course on Retail Motor-Fuel Dispensers (RMFDs) thanks in large part, to Paul Floyd, Director of </div> </div> </div> </article> </div> <footer> <div class="link-list"><a href="/news-events/news-updates/org/6436">View All News and Updates</a></div> </footer> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--dynamic-content-list-ou paragraph--view-mode--default"> <div class="nist-block " > <h2 class="nist-block__title" > <div class="string">Awards</div> </h2> <div class="viewsreference"><div class="views-element-container"><div class="js-view-dom-id-4d43a34d9d503e2e5bff6ee08f0d61918dc94bd3810a469193b744e1a72d4ba4"> <div> <article about="/awards/2024-national-conference-weights-and-measures-ncwm-lifetime-achievement-award-tina-butcher" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/awards/2024-national-conference-weights-and-measures-ncwm-lifetime-achievement-award-tina-butcher" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2024/08/01/20240625-105-Edit-Closeup-Tina%20Butcher.jpg?itok=-i2ZbBQX" width="67" height="100" alt="Tina Butcher" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/awards/2024-national-conference-weights-and-measures-ncwm-lifetime-achievement-award-tina-butcher"><span>2024 National Conference on Weights and Measures (NCWM) Lifetime Achievement Award - Tina Butcher</span> </a></h3> </header> <div class="nist-teaser__content"> <div class="text-long"> The officers and members of the National Conference on Weights and Measures (NCWM) hereby express our greatest respect and appreciation to </div> </div> </div> </article> </div> <div> <article about="/nist-awards/2023-b-stephen-carpenter-award-ralph-richter" class="nist-teaser" > <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/nist-awards/2023-b-stephen-carpenter-award-ralph-richter"><span>2023 - B. Stephen Carpenter Award---Ralph Richter</span> </a></h3> </header> <div class="nist-teaser__content"> <div class="string-long">For leadership in international legal metrology standards to ensure a fair and equitable marketplace for global industrial commodities.</div> </div> </div> </article> </div> <div> <article about="/awards/2023-ncwm-outstanding-contributions-award-david-sefcik" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/awards/2023-ncwm-outstanding-contributions-award-david-sefcik" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2023/08/17/David-NCWM_0.png?itok=qWNMkRqz" width="100" height="77" alt="David Sefcik (center) accepting his award from NCWM Chair-elect Gene Robertson (at the podium), NCWM Chair Mahesh Albuquerque (left) and NIST Director Laurie Locascio (right)." typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/awards/2023-ncwm-outstanding-contributions-award-david-sefcik"><span>2023 NCWM Outstanding Contributions Award - David Sefcik</span> </a></h3> </header> <div class="nist-teaser__content"> <div class="text-long"> David Sefcik of the NIST OWM received the 2023 NCWM Outstanding Contributions Award for his service as a co-organizer of the 2022 NCWM-NIST </div> </div> </div> </article> </div> <footer> <div class="link-list"><a href="/awards/org/6436">View All Awards</a></div> </footer> </div> </div> </div> </div> </div> <div class="paragraph paragraph--type--dynamic-content-list-ou paragraph--view-mode--default"> <div class="nist-block " > <h2 class="nist-block__title" > <div class="string">Events</div> </h2> <div class="viewsreference"><div class="views-element-container"><div class="js-view-dom-id-7b910c28fe69cdadc5c1f73b222845dc878b8f4813847dfba9da93d0ff829c3e"> <div> <article about="/news-events/events/2025/04/81-fundamentals-metrology" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/events/2025/04/81-fundamentals-metrology" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2024/06/05/Metrology%20word%20cloud.jpeg?itok=ljhHruee" width="100" height="74" alt="Metrology word cloud" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/news-events/events/2025/04/81-fundamentals-metrology"><span>81 Fundamentals of Metrology</span> </a></h3> <div class="nist-teaser__date"> <div class="smartdate">Mon, Apr 7 - Fri, Apr 11 2025</div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> Class Description The 5-day Fundamentals of Metrology seminar is an intensive class that introduces participants to the </div> </div> </div> </article> </div> <div> <article about="/news-events/events/2025/04/80-fundamentals-metrology-sim-participants-only" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/events/2025/04/80-fundamentals-metrology-sim-participants-only" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2024/06/05/Metrology%20word%20cloud.jpeg?itok=ljhHruee" width="100" height="74" alt="Metrology word cloud" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/news-events/events/2025/04/80-fundamentals-metrology-sim-participants-only"><span>80 Fundamentals of Metrology - SIM Participants Only</span> </a></h3> <div class="nist-teaser__date"> <div class="smartdate">Mon, Apr 14 - Fri, Apr 18 2025</div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> Course Description The 5-day Fundamentals of Metrology seminar is an intensive course that introduces participants to </div> </div> </div> </article> </div> <div> <article about="/news-events/events/2025/05/nist-owm-info-hour-primary-lab-every-state-how-groundbreaking-kibble" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/events/2025/05/nist-owm-info-hour-primary-lab-every-state-how-groundbreaking-kibble" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/04/02/Leon_.png?itok=OIQVMZw3" width="100" height="56" alt="Announcement for May 1 Info Hour A Primary Lab in Every State" typeof="foaf:Image" /> </a> </div> </div> <div class="nist-teaser__content-wrapper"> <header> <h3 class="nist-teaser__title"><a href="/news-events/events/2025/05/nist-owm-info-hour-primary-lab-every-state-how-groundbreaking-kibble"><span>NIST OWM Info Hour: A Primary Lab in Every State? How Groundbreaking Kibble Balance Technology Will Revolutionize the Mass Calibration Laboratory</span> </a></h3> <div class="nist-teaser__date"> <div class="smartdate">Thu, May 1 2025, 2:00 - 3:00pm EDT</div> </div> </header> <div class="nist-teaser__content"> <div class="text-with-summary"> Please join the OWM Laboratory Metrology Program in welcoming our special guest speaker, Leon Chao, NIST Scientific </div> </div> </div> </article> </div> <div> <article about="/news-events/events/2025/05/nist-owm-info-hour-owms-role-within-ncwm-and-us-weights-and-measures" class="nist-teaser" > <div class="nist-teaser__image"> <div class="entity-reference"> <a href="/news-events/events/2025/05/nist-owm-info-hour-owms-role-within-ncwm-and-us-weights-and-measures" hreflang="en"><img loading="lazy" src="/sites/default/files/styles/thumbnail/public/images/2025/03/31/owm-info-hours-mcguire-john-owm-role-may-2025.png?itok=AVAdcH-6" width="100" height="56" alt="OWM's Role Within NCWM and U.S. Weights and 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