Your weight across the solar system
The same body — yours — would register a wildly different weight on every body in the solar system, because weight is the force of gravity acting on mass. Mass stays constant; gravity varies enormously. Stand on the Moon and you weigh one-sixth of your Earth weight. Stand on Jupiter and you weigh two and a half times more. Stand on the Sun and you couldn\'t move at all — even if you weren\'t already vaporised.
Why each planet\'s gravity is different
Surface gravity follows a simple formula: g = GM/r², where M is the planet\'s mass and r is its radius. Massive planets with small radii produce strong gravity. Massive planets with huge radii — like Saturn — surprisingly produce only modest gravity, because the surface is so far from the centre. The Moon has weak gravity because it\'s small in mass. Jupiter has strong gravity because its mass massively outweighs its radius increase. The Sun has crushing gravity because its mass dwarfs everything.
The gas giants don\'t actually have a surface
For Jupiter, Saturn, Uranus and Neptune, the "surface gravity" we calculate is at the altitude where atmospheric pressure equals 1 bar (Earth sea level). You couldn\'t actually stand there — you\'d sink through ever-denser cloud layers, hit liquid hydrogen, and eventually reach metallic hydrogen under crushing pressure. The numbers below are what you\'d weigh if the gas giants had a solid surface at the cloud-top altitude.
The Sun is a special case
At 28 times Earth gravity, you couldn\'t even breathe on the Sun\'s "surface" — your diaphragm wouldn\'t generate enough force to inflate your lungs. Long before that mattered, you\'d be vapourised by the 5,500°C surface temperature. The number is a curiosity, not a destination.
Try individual planet pages for more detail
Each planet has its own calculator with more context: Moon, Mars, Jupiter, Saturn. Or for something more terrestrial, try the elephant comparison or find your animal weight twin.