Weight on Other Planets Calculator

About this calculator

Weight is not mass — it's the force gravity exerts on that mass, given by W = m × g, where g is the local surface gravitational acceleration. Since g varies from planet to planet based on each body's mass and radius (Earth's is 9.8 m/s², the Moon's is about 1.62 m/s², roughly a sixth of Earth's, and Jupiter's is about 24.8 m/s², roughly 2.5 times Earth's), the same mass produces a dramatically different weight depending on where it's measured.

This is precisely the calculation behind why astronauts appear to bound across the Moon's surface in Apollo footage and why a Jupiter lander would need to be engineered to withstand far greater structural loads than one bound for Mars — spacecraft and suit designers compute exact surface gravity for every mission target using each body's known mass and radius.

Astronomy and physics students exploring Newton's law of gravitation, science communicators explaining planetary differences, and space enthusiasts curious about their own "Mars weight" all use this relationship to turn a single Earth weight into a tour of the Solar System.