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Office of Weights and Measures

NIST OWM establishes uniformity, equity, SI use, and traceability in weights and measures by advancing national and international legal metrology standards, procedures, capabilities, and training.

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.

To learn more about OWM and its roles and responsibilities, click About Us.

Originally established in 1836 as the “Office of Construction of Standard Weights and Measures”, OWM remains the oldest office at NIST. For more information, see A Brief History of OWM.

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5854 Mass Metrology Seminar

Mon, Feb 26 - Fri, Mar 8 2024
The Mass Metrology Seminar is a two-week, "hands-on" seminar. It incorporates approximately 30 percent lectures and 70

5893 Basic Uncertainty Concepts

Thu, Feb 29 2024, 2:00 - 4:00pm EST
This 2-hour webinar provides a very basic introduction to uncertainty calculations and reporting using the 8-step

5905 Volume Metrology Seminar

Mon, Apr 1 - Fri, Apr 5 2024
The 5-day OWM Volume Metrology Seminar is designed to enable metrologists to apply fundamental measurement concepts to

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Newsletter Articles and Updates

2024 National Price Verification Survey

NIST Office of Weights and Measures (OWM) is collaborating with the National Conference on Weights and Measures (NCWM) , together with 28 state and 38 local



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