🪐Weight on Other Planets Calculator
Enter your weight once and explore two planetary systems — switch between kilograms, pounds, and stone, and see your weight on every body instantly.
Free Weight on Other Planets Calculator Online
Ever wondered how much you'd weigh on Mars, the Moon — or a planet orbiting another star? Our free Weight on Other Planets calculator shows you instantly. Enter your weight once and explore two named planetary systems: Our Solar System, with all eight planets plus the Moon, the Sun, and Pluto, and the real TRAPPIST-1 System, a family of seven rocky worlds about 39 light-years away.
Switch between systems with a tap, change between kilograms, pounds, and stone, and compare each world's gravity against Earth's. Because gravity differs on every world, the same you could feel feather-light on one and crushingly heavy on another. TRAPPIST-1's planets are included because they're unusually well-measured — so the weights you see there are based on real science, not guesswork.
Simply enter your weight and explore. No sign-up, no downloads, no limits — just fun, accurate results whenever you need them.