How many years old is the universe?
Science easy Data from 2024
Guess before you scroll — the answer is below
The answer
13,800,000,000 years
Roughly 13.8B.
The universe is about 13.8 billion years old, measured from the cosmic microwave background — the leftover heat of the Big Bang, still detectable in every direction. The margin of error on that figure is under 1%.
Where this number comes from
| Source | ESA Planck mission / NASA |
|---|---|
| Figure refers to | 2024 |
| Last checked | |
| Unit | years |
Numbers move. If this one has drifted from its source, let us know.
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