Weight Calculator
Weight Conversion & Planetary Gravity
On Earth
Your Weight on Other Worlds
Ready for Calculation
Enter your Earth weight to see equivalents on the Moon and other planets.
Why Your Weight Changes in Space
Weight is the force gravity exerts on your mass, so it changes depending on the gravitational pull of whatever world you're standing on. Your mass never changes — but a bathroom scale would read a very different number on the Moon than it does at home.
Why the Moon Feels Lighter
The Moon's gravity is only about 16.6% of Earth's, which is why Apollo astronauts could bound across the surface — their weight (though not their mass) dropped to roughly a sixth of normal.
Jupiter Would Crush You
Jupiter's immense mass gives it surface gravity about 2.36 times Earth's — someone weighing 70 kg on Earth would feel like 165 kg standing on Jupiter's cloud tops.
Mass vs. Weight, Revisited
If you need to convert mass between units without the planetary comparison, our Mass Calculator handles pure unit conversion (mg, g, kg, oz, lb, stone, tons) without the gravity math.
Gravity Ratios Used
Each planet's surface gravity relative to Earth (1.00) is used to scale your weight — figures are approximate averages at each world's "surface" or cloud layer.
Key Takeaways
- Mass Stays Constant: The number of kilograms of "you" never changes — only the force gravity exerts on it does.
- Gas Giants Have No Solid Surface: Figures for Jupiter, Saturn, Uranus, and Neptune use gravity at their visible cloud tops, since they have no solid ground to stand on.
- Fun, Not Clinical: This tool is for educational and entertainment purposes — for medical weight assessment, see our BMI or Ideal Weight calculators.