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.

Reference data

Overview

Learn more about NIST's data products:

News

When Standardized Data Can Help Save Lives

When you email a friend, you don’t have to worry about whether they use Gmail, Outlook, Yahoo or some other email provider. You just enter their email address, write your message and hit send. The reason this works is that there are layers of standardized protocols that all the email clients have adopted so emails can seamlessly fly between users regardless of which client they choose. Many other

Reliable Flow for Chip Makers

NIST Helps Next-Generation Cell Technology See Past the Greenery

Latest Values of Fundamental Constants Published