Enter your weight on Earth and select your preferred unit (lbs or kg) to instantly see your weight on every planet in the solar system. The calculator applies each planet's surface gravity relative to Earth's to show you how heavy — or light — you'd feel on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune.
Your Weight on Mars
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Mercury
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Venus
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Jupiter
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Saturn
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Uranus
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Neptune
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Weight is determined by the gravitational pull of a planet acting on your mass. Each planet has a different size and density, which affects its surface gravity. Your mass stays the same, but your weight — the force gravity exerts on that mass — changes depending on which planet you're standing on.
You would weigh the most on Jupiter, the largest planet in our solar system. Jupiter's surface gravity is about 2.36 times that of Earth, so a person who weighs 70 kg on Earth would weigh roughly 165 kg on Jupiter.
You would weigh the least on Mercury. Despite being a rocky planet, Mercury is quite small, giving it a surface gravity only about 0.38 times that of Earth. A 70 kg person would weigh just about 26.5 kg on Mercury.
You would weigh significantly less on Mars. Mars has a surface gravity about 0.378 times that of Earth, so a 70 kg person would weigh roughly 26.5 kg there. This lower gravity is one of the key challenges for long-term human missions to Mars.
Mass is the amount of matter in your body and stays constant no matter where you are in the universe. Weight is the force that gravity exerts on your mass, so it changes depending on the gravitational field of the planet you are on. This calculator shows how your weight changes, not your mass.
Saturn is about 9 times wider than Earth but is composed mostly of hydrogen and helium gas, making it much less dense. Its lower average density means its surface gravity is only about 1.07 times Earth's — surprisingly close to our own planet despite its enormous size.
This calculator focuses on the eight major planets of the solar system. The Moon has about 0.165 times Earth's gravity, so a 70 kg person would weigh roughly 11.5 kg there. Moons across the solar system, including Jupiter's large moons like Europa and Ganymede, each have their own gravity levels.
Gravity is a force that depends on the mass of a planet and your distance from its center (its radius). The formula is g = GM/r², where G is the gravitational constant, M is the planet's mass, and r is its radius. Larger, denser planets exert more gravitational force, making you feel heavier on their surface.