Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Services & Resources

NIST's weights and measures services, a job assigned to the federal government in the Constitution, provide the basis for the fairness and efficiency of sales. These services underpin the efficiency of about half the U.S. economy, or about $7 trillion of the U.S. gross domestic product.

Created January 5, 2015, Updated August 25, 2016