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Office of Weights and Measures

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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5858 Fundamentals of Metrology

Mon, Jan 29 - Fri, Feb 2 2024
The 5-day Fundamentals of Metrology seminar is an intensive course that introduces participants to the concepts of

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Newsletter Articles and Updates

2023 NIST Internship Reflections

During the summer of 2023, the NIST Physical Measurement Laboratory’s ( PML ) Office of Weights and Measures ( OWM ) hosted four undergraduate students who were

Metric Week 2023: Seven Days of SI Fun

National Metric Week (October 8 to 14, 2023) is an opportunity to underscore the usefulness of metric system measurements, formally known as the International



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