Weight on Other Planets Calculator

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):

Saturn and Uranus are the surprise here. Both are enormous, yet you would weigh close to your Earth weight standing on either one, because their low density spreads that mass over a huge radius. Uranus would actually make you slightly lighter than Earth does.

Worked example:

A person weighs 165 lb (75 kg) on Earth.

• On the Moon: 165 × 0.165 = 27.2 lb (12.3 kg), and you could jump roughly 6× higher
• On Mars: 165 × 0.379 = 62.5 lb (28.4 kg), about as heavy as a 10-year-old child on Earth
• On Jupiter: 165 × 2.528 = 417 lb (189 kg), and 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 2.528× Earth gravity rather than 318×. Note that “surface” is doing some work in that sentence: Jupiter has no surface, so the figure is quoted at the altitude where the pressure equals one bar.

Fun comparison:

The Sun’s surface gravity is 27.95× Earth’s. That same 165 lb person would weigh 4,612 lb at the Sun’s visible surface, which is roughly a large SUV pressing down on each foot.

Mass always stays constant. Only weight changes with gravity.