SpaceFor a person of 50 kg
| World | Gravity (m/s²) | Compared with Earth | 50 kg feels like |
|---|---|---|---|
| Mercury | 3.7 | 38% | 18.9 kg |
| Venus | 8.9 | 91% | 45.4 kg |
| Earth | 9.8 | 100% | 50 kg |
| Moon | 1.6 | 16% | 8.2 kg |
| Mars | 3.7 | 38% | 18.9 kg |
| Jupiter | 23.1 | 236% | 117.9 kg |
| Saturn | 9 | 92% | 45.9 kg |
| Uranus | 8.7 | 89% | 44.4 kg |
| Neptune | 11 | 112% | 56.1 kg |
| Pluto | 0.7 | 7% | 3.6 kg |
Figures: NASA NSSDCA Planetary Fact Sheet, last updated by NASA on 18 March 2025, read on 12 November 2026.
How it is worked out
Your weight is the pull of gravity on your body. On a world with stronger gravity you are pulled harder and weigh more. The sum is simple: your weight on Earth, times that world's gravity, divided by Earth's gravity of 9.8 m/s².
Weight and mass
Strictly, kilograms measure mass, the amount of stuff in you, and that stays the same wherever you go. What changes is your weight, the force with which you are pulled down. A bathroom scale really measures that force and then shows it as kilograms, on the assumption that you are on Earth. So "21 kg on Mars" means: a scale brought from Earth would read 21.
Things to notice
- On the Moon you would weigh about a sixth of your Earth weight, which is why astronauts there could leap and bound.
- Jupiter is the only world in the list where you would weigh more than double.
- Saturn is 95 times as massive as Earth, yet its gravity at the cloud tops, 9 m/s², is a little less than Earth's, because Saturn is so wide.
- Mercury and Mars have the same gravity, 3.7 m/s², though Mars is the larger of the two.
A fair warning
The four giant planets have no solid ground to put a scale on. Their figures are for the level in the atmosphere where the pressure equals 1 bar. And no person has yet stood on any world but Earth and the Moon.
What you type stays in your browser. See also your age on other planets.