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Weights & measures

NIST works to improve the accuracy of measurements, enhance consumer protection, foster fair competition, and facilitate economic growth and trade through technical activities that promote uniformity in national and international legal metrology laws, regulations, standards, test procedures and enforcement.

The Research

Projects & Programs

International System of Units (SI)

Ongoing
Members of the Fundamental Constants Data Center (FCDC) participate in meetings of the Consultative Committee for Units (CCU) which advises the International Committee for Weights and Measures on matters concerning the SI. The latest meeting of the CCU, held at the BIPM in June of 2013 was attended

Additional Resources Links

News

The Reason the U.S. Doesn't Use the Metric System

Recorded Webinars for Weights and Measures Available On-Demand!

Update on NIST Activities for EVSE

Upcoming Events

91 Mass Metrology Seminar

Mon, Oct 21 - Fri, Nov 1 2024
Course Description The Mass Metrology Seminar is a two-week, "hands-on" seminar. It incorporates approximately 30

5866 Fundamentals of Metrology

Mon, Oct 21 - Fri, Oct 25 2024
Course Description The 5-day Fundamentals of Metrology seminar is an intensive course that introduces participants to

89 Fundamentals of Metrology

Mon, Jan 27 - Fri, Jan 31 2025
Course Description The 5-day Fundamentals of Metrology seminar is an intensive course that introduces participants to