An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
One of OWM's main responsibilities is to harmonize international and national documentary standards with those used by the U.S. weights and measures community
The OWM Laboratory Metrology group operates an ISO 17043 compliant Proficiency Testing (PT) program that assesses the effectiveness of the metrology training
NIST Office of Weights and Measures (OWM) resumed limited in-person laboratory metrology training at the Gaithersburg campus starting on January 31, 2022. We