Age on Other Planets
Convert your age and weight for every planet in the solar system.
Enter your Earth stats
| Planet | Age (years) | Weight (kg) |
|---|---|---|
Mercury Year length: 0.24 Earth years | 124.56 | 26.60 |
Venus Year length: 0.62 Earth years | 48.76 | 63.00 |
Earth Year length: 1.00 Earth years | 30.00 | 70.00 |
Mars Year length: 1.88 Earth years | 15.95 | 26.60 |
Jupiter Year length: 11.86 Earth years | 2.53 | 163.80 |
Saturn Year length: 29.45 Earth years | 1.02 | 74.20 |
Uranus Year length: 84.02 Earth years | 0.36 | 64.40 |
Neptune Year length: 164.79 Earth years | 0.18 | 83.30 |
See how alien birthdays stack up
Plug in your Earth age and optional weight to view a planet-by-planet breakdown. We handle the orbital math so you can share a fun fact at your next science night-or double-check numbers for classroom projects.
What you get
- Age in planet-years for Mercury through Neptune.
- Estimated weight on each planet using gravity ratios.
- Quick reference for orbital period and gravity side-by-side.
Fun use cases
Share cosmic birthdays on social media, build lesson plans for astronomy classes, or sanity-check sci-fi worldbuilding with realistic physics inputs.
Sample output
- Age 30 → 125.38 Mercury years - 15.96 Mars years - 2.53 Jupiter years.
- Weight 70 kg → 26.60 kg on Mercury - 163.80 kg on Jupiter.
Related tools
- Need precise Earth age first? Start with the Age Calculator.
- Planning interplanetary travel times? Use the Speed Converter to compare velocities.
FAQ
Why stop at Neptune? Pluto and dwarf planets have orbital period data too-we plan to add them in a future update.
Can I switch to pounds? Enter your weight in kilograms for now. Later updates will include unit toggles.