About this tool
The Weight on Other Planets Calculator instantly shows how much you would weigh across the Solar System. Type your weight on Earth in pounds, kilograms or stone and it multiplies that figure by each body's surface-gravity ratio, listing Mercury, Venus, the Moon, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto and the Sun side by side.
Your mass never changes, but weight is the pull of gravity on that mass, so it scales with local surface gravity. The formula is simply weight_on_body = earth_weight × gravity_ratio, where the ratio is that world's surface gravity divided by Earth's. Mars pulls at about 0.377 g, the Moon at 0.166 g, Jupiter at 2.36 g and the Sun at a crushing 27.9 g, so a 100 lb person weighs 37.7 lb on Mars and 2,790 lb on the Sun.
Everything is computed locally in your browser with plain arithmetic — nothing you enter is uploaded or stored. Because the gravity ratios are dimensionless, the answers come back in whatever unit you typed, making it easy to compare, say, a 150 lb hiker or a 68 kg astronaut across ten different worlds at a glance.