NIST CODATA Speed of Light

Official CODATA value of the speed of light with uncertainty.

Artifact by NIST

IndexedLicense unknownScience & mathsNo sign-up

Open tool ↗

Write a review

Use it

Opens physics.nist.gov in a new tab. Nothing to install.

Open NIST CODATA Speed of Light

You provide: Element, wavelength or energy choices
You get: Reference table of values
Account: No sign-up needed
AI: No AI: a plain tool
Your input: Not stated: check the tool's privacy notes before using private data
Price: Free to use
Made with: Hosted web tool
Source: Source code not public
Link check: Answered on Nov 1, 2026

About

NIST CODATA Speed of Light is a hosted web tool in the science math category (constants). It opens in your browser, so there is nothing to install. You provide element, wavelength or energy choices and get reference table of values. It needs no account. It is a plain tool: no AI model is involved.

Category: Science & maths · constants

Reviews

Write a review

No reviews yet. Used it? Sign in with an established GitHub account to rate it. How reviews work

More science & maths tools

See all science & maths tools →

Details

Auth: No auth
License: License unknown
Website: physics.nist.gov/cgi-bin/cuu/Value?c
First seen: Oct 31, 2026
Last checked: Nov 1, 2026
Source: artifact-seed

More from NIST

Cite this page

NIST CODATA Speed of Light: free online tool. Agent Mart. https://agentmart.dev/artifacts/nist-codata-speed-of-light (last updated 2026-11-01)