Planet Weight Calculator

Weight is the force gravity exerts on your mass, and it changes from body to body because surface gravity itself depends on both how much mass a planet has and how far its surface sits from that mass's centre — a small, dense planet and a large, diffuse one can have similar surface gravity for very different reasons. Every value here is the real, published surface gravity of that body relative to Earth's, not a rounded or invented figure.

Mass is a different, unchanging quantity — the actual amount of matter making you up, which stays exactly the same wherever you are. A bathroom scale reads weight, not mass, which is the entire reason this calculation is even meaningful: the same unchanged person genuinely reads a different number standing on a scale on the Moon than on Earth.

Jupiter and Saturn are worth a second look on the results: despite being far more massive than Earth, their surface gravity (defined at the visible cloud tops, since neither has a solid surface) is only moderately higher for Jupiter and actually slightly lower for Saturn — both are large enough that 'surface' sits much further from the planet's centre of mass than Earth's does, which works against their far greater total mass.