Science / 01
Your Weight on Other Planets
Find out how much you would weigh on the Moon, Mars, Jupiter, and every other planet, using NASA's surface gravity figures, a fun science page for children and the curious.
Your Weight on Other Planets: Weight is the force of gravity on your body, so it changes from world to world while your mass stays the same. The calculator multiplies your Earth weight by each body's surface gravity divided by Earth's, using the figures in NASA's Planetary Fact Sheet. For the giant planets, which have no solid ground, the figure is at the level where the atmosphere's pressure equals Earth's at sea level. Runs 100% locally in your browser with zero server file uploads.
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Your mass stays the same everywhere; what changes is how hard each world pulls on it, which a bathroom scale reads as weight. Gravity figures are from NASA's Planetary Fact Sheet. Jupiter, Saturn, Uranus, and Neptune have no solid surface, so their figures are for the height where the air pressure equals Earth's at sea level.
Why gravity differs
The pull at a planet's surface depends on its mass and on how far the surface is from its centre. Mars has about a tenth of Earth's mass but is also smaller, so its gravity is about 38% of Earth's. Jupiter is so massive that, even measured at its far-out cloud tops, it pulls more than twice as hard as Earth.
Astronauts on the Moon, at a sixth of Earth's gravity, found it easier to bounce than to walk. On Mars, future explorers will weigh about as much as a child of a third of their size does on Earth.
Explore the sky
The Moon's phase tonight, and when it rises and sets where you are, are on the moon phase page. To switch your weight between kilograms and pounds first, use kg to lbs.
How to use it
- Enter your weight on Earth in kilograms or pounds.
- See your weight on each planet, the Moon, and Pluto.
- Compare how strong each world's gravity is next to Earth's.
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Frequently asked questions
Why would I weigh less on the Moon?
The Moon has much less mass than Earth, so it pulls on you about one sixth as strongly. Someone who weighs 60 kg on Earth would register about 10 kg on a scale on the Moon.
Is my mass different on other planets?
No. Mass is how much matter you are made of and is the same everywhere. Weight is the pull of gravity on that mass, which is what a bathroom scale really measures.
Could I stand on Jupiter?
No: Jupiter, Saturn, Uranus, and Neptune are giant balls of gas and liquid without a solid surface. The weights shown are for the height where the air pressure matches Earth's at sea level.
Why does Saturn's gravity feel so close to Earth's?
Saturn has 95 times Earth's mass, but it is so wide that its cloud tops are far from its centre, and gravity weakens with distance. The two effects nearly cancel.
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