How it works
Your mass stays the same everywhere, but the pull of gravity changes. The tool multiplies your weight by each world's surface gravity compared with Earth's, using NASA's planetary fact sheet.
Jupiter, Saturn, Uranus and Neptune have no solid surface, so their figures are for the cloud level where the air pressure matches Earth's at sea level.
Age on another planet is your age in Earth years divided by the length of that planet's year. One year on Mars lasts about 1.9 Earth years, so you would be about half as old there.
Everything is calculated in your browser. Your location is used only on this page and is never sent to us.
Gravity and orbitsWhy planets circle the Sun, why the Moon never falls, and what keeps JWST in place.
Solar SystemThe Sun, eight planets, dwarf planets and icy belts, from Mercury to the Oort Cloud.
MarsThe cold red desert world with the tallest volcano in the Solar System.
JupiterThe giant striped planet with a centuries-old storm and four big moons.