Weight on Other Planets Calculator
Calculate your weight in lbs and kg on every planet, the Moon, and the Sun from surface gravity.
Returns weight and gravity multiplier for all 8 planets.
How Planet Weight Calculations Work
Your weight is not a fixed property of your body — it is the gravitational force the planet exerts on your mass. On a different planet with different gravity, you weigh more or less even though your mass stays the same.
Core formula:
Weight on planet = Weight on Earth × (Planet gravity ÷ Earth gravity)
Since we typically use surface gravity ratios, this simplifies to:
Weight on planet = Earth weight × Gravity multiplier
Surface gravity multipliers (relative to Earth = 1.0):
| Planet | Gravity Multiplier |
|---|---|
| Mercury | 0.38 |
| Venus | 0.91 |
| Moon | 0.165 |
| Mars | 0.38 |
| Jupiter | 2.34 |
| Saturn | 1.06 |
| Uranus | 0.92 |
| Neptune | 1.19 |
Worked example:
A person weighs 165 lb (75 kg) on Earth.
- On the Moon: 165 × 0.165 = 27.2 lb (11 kg) — you could jump roughly 6× higher
- On Mars: 165 × 0.38 = 62.7 lb (28.5 kg) — about as heavy as a 10-year-old child on Earth
- On Jupiter: 165 × 2.34 = 386 lb (175 kg) — you could barely stand
Why Jupiter’s gravity is so strong:
Jupiter is 318× Earth’s mass, but also much larger. Surface gravity depends on both mass and radius: g = GM/r². Jupiter’s enormous radius partially offsets its mass, giving 2.34× Earth gravity rather than 318×.
Fun comparison:
The Sun’s surface gravity is 28× Earth’s. That same 165 lb person would weigh 4,620 lb on the Sun’s surface — equivalent to a large SUV pressing down on each foot.
Mass always stays constant. Only weight changes with gravity.