Weight on other planets: what the scales would say across the solar system
Type your weight once and this weight on other planets calculator shows what a bathroom scale would read on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, the Moon, Pluto, Ceres and the big moons Io, Europa, Ganymede and Titan — and, for fun, at the surface of the Sun. Enter kilograms, pounds or stones; the result for the body you highlight appears in the big panel, with a bar chart and a full table below it.
The figures use the equatorial surface gravities published in NASA’s Planetary Fact Sheet. Your mass — the amount of matter in you — never changes; what changes is the gravitational pull on it, so a 70 kg person who weighs 686 newtons on Earth would register the equivalent of 26 kg on Mars and 177 kg on Jupiter. Everything is calculated in your browser, with nothing sent anywhere.
How to use the Weight on Other Planets
- Enter Your weight on Earth and choose kilograms, pounds or stones (type the stones figure, e.g. 11).
- Pick a body in Highlight — or click any row in the table — to show it in the big panel with a short fact.
- Read the bar chart for a quick visual comparison; hover or tap a bar for the exact value.
- Use the table for every body, its surface gravity in m/s², the multiple of Earth gravity, and your weight there; the copy icon copies a single result.
Weight on Other Planets features
Sixteen bodies
All eight planets, the Sun, the Moon, the dwarf planets Pluto and Ceres, and the moons Io, Europa, Ganymede and Titan.
NASA fact-sheet gravities
Equatorial surface gravity for solid bodies and the one-bar cloud-top level for the gas giants, divided by standard gravity (9.806 65 m/s²).
kg, lb or stones
Enter and read results in whichever unit you use; stones are displayed as stones and pounds.
Chart and table
Bars scaled to Jupiter’s pull make the differences obvious; the table gives three-decimal multiples for homework.
A fact per body
Each highlight comes with a short, accurate note about why the gravity is what it is.
Why your weight changes but your mass does not
Weight is the force gravity exerts on your mass: W = m × g. On Earth g is about 9.81 m/s², so 70 kg of mass weighs 687 newtons. Bathroom scales are calibrated to show that force as kilograms or pounds, which is why we talk about “weighing 70 kg”. Move the same person to Mars, where g is 3.71 m/s², and the force drops to 260 N — the scale would read 26.5 kg — but the person still contains 70 kg of matter and is just as hard to push sideways.
Surface gravity depends on a body’s mass and radius (g = GM/r²), which produces some surprises. Saturn is 95 times Earth’s mass, yet because it is so large and so light for its size, its cloud-top gravity is only 6% higher than ours. Mercury and Mars have almost identical gravity despite Mars being nearly twice as wide, because Mercury is much denser. And Uranus, four times Earth’s diameter, has lower surface gravity than Earth.
Surface gravity reference table
For the gas giants there is no ground to stand on; the convention, used by NASA and here, is the level where atmospheric pressure equals one bar. To change between kilograms, pounds and stones for any other purpose, the weight converter does it directly.
| Body | Gravity (m/s²) | × Earth | 70 kg person |
|---|---|---|---|
| Sun (photosphere) | 274.0 | 27.9 | 1 956 kg |
| Mercury | 3.70 | 0.377 | 26.4 kg |
| Venus | 8.87 | 0.904 | 63.3 kg |
| Earth | 9.81 | 1.000 | 70.0 kg |
| Moon | 1.62 | 0.165 | 11.6 kg |
| Mars | 3.71 | 0.378 | 26.5 kg |
| Jupiter | 24.79 | 2.528 | 177 kg |
| Saturn | 10.44 | 1.065 | 74.5 kg |
| Uranus | 8.87 | 0.904 | 63.3 kg |
| Neptune | 11.15 | 1.137 | 79.6 kg |
| Pluto | 0.62 | 0.063 | 4.4 kg |
Why this matters beyond the classroom
Low gravity is one of the central problems of human spaceflight. Astronauts on the ISS, in effective weightlessness, lose 1–2% of bone density a month without exercise; Mars at 0.38 g may slow that but not stop it. Low gravity also sets the rules of engineering: a rover that weighs 900 kg on Earth presses on Martian soil with the force of 340 kg, and the Moon’s one-sixth gravity is why the Apollo lunar module could lift off on a single small engine. The age on other planets calculator covers the other classic question — how old you would be in each planet’s years.
Weight on Other Planets FAQ
How much would I weigh on Mars?
About 38% of your Earth weight. A 70 kg person reads 26.5 kg; 150 lb becomes 57 lb. Mars’s gravity is 3.71 m/s² compared with Earth’s 9.81.
How much would I weigh on the Moon?
About one-sixth — 16.5% — of your Earth weight: 70 kg becomes 11.6 kg and 150 lb becomes 25 lb.
Which planet would I weigh the most on?
Jupiter, at 2.53 times your Earth weight at its cloud tops. Only Jupiter, Saturn and Neptune have higher surface gravity than Earth; Venus and Uranus are slightly lower.
Does my mass change on other planets?
No. Mass is the amount of matter and stays the same everywhere. Weight is the force gravity exerts on that mass, which is what changes from body to body.
How is weight on another planet calculated?
Multiply your Earth weight by the ratio of the other body’s surface gravity to Earth’s standard gravity: weight × (g / 9.80665). For Jupiter that is weight × 24.79/9.80665 = weight × 2.528.
Why do different sites give slightly different answers?
Some use rounded gravity ratios, some use Earth’s equatorial gravity (9.78 m/s²) instead of standard gravity, and the gas-giant values depend on the pressure level chosen. The differences are a few percent at most.