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Weight on Other Planets Calculator
Enter your Earth weight to instantly see what you would weigh on every planet in the solar system, the Moon, and the Sun. Supports kg and lbs. All gravity values sourced from NASA planetary data.
Quick Answer
Your weight changes on every planet because gravity varies. On Mars you weigh 37.8% of your Earth weight. On Jupiter you weigh 252.8% — more than double. On the Moon just 16.5%. Your mass never changes — only the gravitational force acting on it does. Enter your weight below to see all planets at once.
Why Does Your Weight Change on Other Planets?
Your weight is not a fixed property of your body — it is the result of a gravitational force acting on your mass. On Earth, gravity pulls you toward the ground at 9.807 meters per second squared (m/s²). Every planet has a different gravitational pull depending on its size and mass, which is why you would weigh dramatically different amounts across the solar system.
Mass vs Weight — The Key Difference
Your mass — measured in kilograms — is the amount of matter in your body. It never changes, whether you are on Earth, Mars, Jupiter, or floating in deep space. Your weight, however, is a force — the gravitational force pulling your mass toward a planet's center. The formula is simple: Weight = Mass x Surface Gravity. Because surface gravity varies between planets, your weight varies too. On a planet with half Earth's gravity, you weigh half as much. On a planet with triple Earth's gravity, you weigh triple.
Mars and the Colony Implication
Mars has a surface gravity of 3.721 m/s² — only 37.8% of Earth's. This has real consequences for human colonists. On the positive side, everything feels lighter and physical labor requires less effort. However, the human skeleton evolved under Earth's gravity. In lower gravity, bones lose density and muscles atrophy over time. Astronauts on the International Space Station lose 1-2% of bone density per month in zero gravity. Mars colonists would lose density more slowly but still at a medically significant rate, requiring daily intensive exercise. Interestingly, Mars and Mercury have almost identical surface gravity — both around 3.7 m/s² — despite being very different planets.
Jupiter — Why You Could Not Stand There
Jupiter's surface gravity of 24.79 m/s² is 2.53 times Earth's. At this gravity, a 70 kg person would effectively weigh 177 kg. Their heart would struggle to pump blood, bones would be under enormous stress, and breathing would be difficult. Beyond the gravity issue, Jupiter has no solid surface — it is a gas giant. No human or spacecraft could land on Jupiter.
Gravity Values — All Sourced from NASA
- Mercury: 3.70 m/s² — 37.7% of Earth
- Venus: 8.87 m/s² — 90.4% of Earth
- Earth: 9.807 m/s² — baseline
- Moon: 1.62 m/s² — 16.5% of Earth
- Mars: 3.721 m/s² — 37.9% of Earth
- Jupiter: 24.79 m/s² — 252.8% of Earth
- Saturn: 10.44 m/s² — 106.5% of Earth
- Uranus: 8.87 m/s² — 90.4% of Earth
- Neptune: 11.15 m/s² — 113.7% of Earth
- Sun: 274.0 m/s² — 2794% of Earth
Frequently Asked Questions
On Mars you would weigh 37.8% of your Earth weight. Mars has a surface gravity of 3.721 m/s² compared to Earth's 9.807 m/s². To calculate manually: multiply your weight by 0.378. Examples: 50 kg on Earth = 18.9 kg on Mars. 70 kg = 26.5 kg. 100 kg = 37.8 kg. 150 lbs = 56.7 lbs. 200 lbs = 75.6 lbs. Use the calculator above for your exact number in either kg or lbs.
On Jupiter you would weigh 252.8% of your Earth weight — more than double. Jupiter has the strongest surface gravity of any planet at 24.79 m/s². A 70 kg person weighs 177 kg on Jupiter. A 150 lb person weighs 379 lbs. However, Jupiter has no solid surface — it is a gas giant. This weight is calculated at the point in Jupiter's atmosphere where pressure equals Earth's sea level.
On the Moon you would weigh only 16.5% of your Earth weight. The Moon's surface gravity is 1.62 m/s². A 70 kg person weighs about 11.3 kg on the Moon. A 150 lb person weighs about 24.8 lbs. This extremely low gravity is why Apollo astronauts bounced in a kangaroo-like hop to move around, and could lift objects that would be impossibly heavy on Earth.
Among the 8 planets, you would weigh the most on Jupiter (252.8% of Earth weight) and the least on Mercury (37.7% of Earth weight). Interestingly, Mars and Mercury have almost identical surface gravity — both around 3.7 m/s² — so you would weigh nearly the same on both. Including the Sun, you would weigh about 28 times your Earth weight on the Sun's surface.
Mass is the amount of matter in your body — a fundamental property that does not change with location. Weight is the force of gravity acting on your mass: Weight = Mass x Gravity. Since gravity varies between planets (depending on size and density), your weight changes even though the amount of matter in your body is identical. In deep space, far from any planet, you would have your full mass but effectively zero weight.
Yes — significantly. Mars has only 37.8% of Earth's gravity, which causes bone density loss and muscle atrophy over time. The human body evolved under Earth's gravity and depends on it for maintaining bone and muscle mass. Astronauts on the ISS lose 1-2% of bone density per month in zero gravity. Mars colonists would lose density more slowly but still at a medically concerning rate, requiring intensive daily exercise regimens. Read more: Can Humans Live on Mars?