Skip to main content
U.S. flag

An official website of the United States government

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.

News and Updates

Displaying 1 - 13 of 13

Helping Laser Scanners Measure Up

Scientists at the National Institute of Standards and Technology (NIST) have devised a novel, accurate, easy-to-operate, time- and labor-saving way to provide

Making Sure that Lumber Measures Up

For some, it is a shocking revelation. But most Americans eventually come to accept the fact that a “two by four” board is actually 1.5 inches by 3.5 inches (38

NIST Goes the Distance for the Olympics

In yet another Olympian feat of measurement, researchers at the National Institute of Standards and Technology (NIST) recently calibrated a tape that will be

Redefining the SI Base Units

Note: Much more recent information is available about redefinition of the SI units. For a comprehensive general overview, see How to Weigh Everything from