Weight on Other Worlds
What would you weigh on Mars? How about Jupiter or the Moon? Weight depends on surface gravity, which varies dramatically across our solar system. Enter your mass (or Earth weight) and select a destination to discover what the scales would read. This calculator uses NASA's published surface gravity values for planets, moons, and even the Sun.
How We Calculate This
Weight = mass × surface gravity. Scale weight (kg equivalent) = mass × (g_target / g_earth), where g_earth = 9.80665 m/s². Surface gravity values are from NASA planetary fact sheets.
Frequently Asked Questions
What's the difference between mass and weight?
Mass is the amount of matter in an object (measured in kg) and doesn't change with location. Weight is the force of gravity on that mass (measured in Newtons) and varies with surface gravity. When we say "weight in kg," we mean the scale reading, which equals mass × (local gravity / Earth gravity).
Where does surface gravity data come from?
Surface gravity values are from NASA. Note that gas giants like Jupiter don't have a solid surface, so the "surface gravity" is measured at the 1-bar pressure level in the atmosphere.
Could I actually stand on Jupiter?
No! Jupiter has no solid surface. The gravity value is measured at cloud-top level. You'd fall into increasingly dense gas. Similar applies to Saturn, Uranus, and Neptune.
Why is the Sun's gravity so extreme?
The Sun contains 99.86% of the solar system's mass. Its surface gravity is about 28× Earth's. You'd be crushed (and vaporized) long before reaching the "surface."
Related Calculators
You might also find these calculators helpful: Age on Other Planets, and Escape Velocity.