Age of the universe

13.8 billion yrs

Time since the Big Bang

Estimated Big Bang and cosmology · Verified 2026-10-29 · WWV-UN-001

Measurements of the oldest light in the sky put the age of the universe at about 13.8 billion years. ESA's Planck mission gave 13.82 billion, and NASA's WMAP mission gave 13.77 billion.

Different missions agree to within about a percent, but small differences remain.

Sources

ESA Planck mission
NASA StarChild