Your Age on Other Planets
Each planet orbits the Sun at a different speed. Enter your birthday and discover how old you would be if you lived on Mercury, Mars, Jupiter and beyond.
How old are you on other planets?
A planet year is the time it takes for a planet to complete one full orbit around the Sun. Since each planet orbits at a different speed and distance, a year is a completely different length of time on each one. Mercury completes its orbit in just 88 Earth days, while Neptune takes 165 Earth years to go around the Sun once.
Why is your age different on each planet?
Your age in planet years is your Earth age divided by how long that planet takes to orbit the Sun. A 30-year-old on Earth is already 124 Mercury years old, but only 0.18 Neptune years old. The difference is enormous because each planet moves at a completely different orbital speed.
Planet year lengths compared to Earth
Mercury: 88 Earth days (0.24 years). Venus: 225 Earth days (0.62 years). Mars: 687 Earth days (1.88 years). Jupiter: 11.9 Earth years. Saturn: 29.5 Earth years. Uranus: 84 Earth years. Neptune: 165 Earth years. Pluto: 248 Earth years.
How is planet age calculated?
The formula is simple: Planet Age = Earth Age divided by Planet Year Length in Earth years. For example, if you are 30 years old, your Mars age is 30 divided by 1.88 = 15.96 Mars years. On Jupiter it would be 30 divided by 11.86 = 2.53 Jupiter years.