Weight on Other Planets Calculator
See how much you'd weigh on Mars, Jupiter, the Moon and beyond.
Enter your weight on Earth and instantly see what a scale would read on every other planet, the Moon and the Sun — based on each body's real surface-gravity ratio (NASA Planetary Fact Sheet). Switch between kilograms and pounds, jump straight to a specific planet, and see the exact gravity multiplier for each world. Runs fully in your browser — nothing is uploaded.
About Weight on Other Planets Calculator
- Switch between kilograms and pounds at any time — every result recalculates instantly.
- Jump straight to a specific planet with the searchable dropdown.
- No sign-up, no app — 100% free and private, everything runs in your browser.
Weight on Other Planets Calculator features
- Instant weight conversion for all 8 planets plus the Moon, Pluto & the Sun
- NASA Planetary Fact Sheet surface-gravity ratios, including Jupiter & Saturn's rotation-adjusted figures
- Switch between kilograms and pounds at any time
- Searchable dropdown to jump straight to a specific planet
- A short fun fact for every world
- Free, key-less, and 100% client-side — nothing you enter is uploaded
How to use Weight on Other Planets Calculator
Enter your weight
Type your weight on Earth into the box — kilograms or pounds, whichever you prefer.
Pick a unit
Toggle kg / lb at any time; every planet's result converts instantly.
Scan the results
Each card shows the planet's gravity relative to Earth and your recalculated weight there.
Jump to a planet
Use the dropdown to scroll straight to Mars, Jupiter or any other world.
Frequently asked questions
How much would I weigh on Mars?
Mars has about 0.377 times Earth's surface gravity, so you'd weigh roughly 38% of your Earth weight there — someone who weighs 70 kg (154 lb) on Earth would weigh about 26.4 kg (58 lb) on Mars. Enter your own weight above to see the exact figure.
How is weight on other planets calculated?
Weight = mass × local gravity. Your mass stays the same everywhere, but each planet pulls on it with a different force. This calculator multiplies your Earth weight by each planet's surface-gravity ratio (relative to Earth's 9.8 m/s²) to get what a scale would read there.
Why do I weigh less on the Moon?
The Moon is far smaller and less massive than Earth, giving it only about 16.6% of Earth's surface gravity. That's why astronauts could bound around in huge leaps during the Apollo missions — a 70 kg (154 lb) person weighs only about 11.6 kg (26 lb) on the Moon.
Which planet has the strongest gravity?
Among the eight planets, Jupiter has the strongest surface gravity — about 2.36 times Earth's, so you'd weigh well over double your Earth weight there. The Sun's gravity is even stronger, at roughly 27.9 times Earth's.
Why isn't Saturn's gravity as strong as its size suggests?
Saturn is the least dense planet in the solar system — it's made almost entirely of gas and would float in water if there were an ocean big enough. Despite being far larger than Earth, its surface gravity is only about 0.916 times Earth's.
Is this weight on other planets calculator free?
Yes — completely free, with no sign-up and no app to install. Every calculation runs instantly in your browser, and nothing you enter is stored or uploaded.
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