Your Age on Other Planets
A year is just one trip around the Sun — and every planet takes a different amount of time. Enter your birthday to find out how old you’d be elsewhere in the Solar System.
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How is this calculated?
Your age on Earth is the number of trips Earth has made around the Sun since you were born. For other planets we count the days you’ve been alive and divide by the length of that planet’s year (its orbital period in Earth days).
Mercury zips around the Sun in just 88 days, so you’re much “older” there. A year on Neptune, on the other hand, lasts almost 165 Earth years — no human has ever celebrated a first birthday on Neptune!
How long is a year on each planet?
| Planet | One year (Earth days) |
|---|---|
| Mercury | 87.97 |
| Venus | 224.7 |
| Earth | 365.26 |
| Mars | 686.98 |
| Jupiter | 4,332.59 |
| Saturn | 10,759.22 |
| Uranus | 30,688.5 |
| Neptune | 60,182 |
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