About the Weight on Other Planets Calculator
This weight on other planets calculator shows what a bathroom scale would read if you stood on Mercury, Venus, the Moon, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Jupiter’s and Saturn’s largest moons — or even the Sun. Enter your weight on Earth in pounds or kilograms, choose the world you are most curious about, and the calculator scales it by that body’s surface gravity.
It is a favourite for classrooms, science fairs and space-curious kids, and a quick way to make gravity tangible: a 150 lb person would weigh about 57 lb on Mars, 25 lb on the Moon and nearly 400 lb on Jupiter. The table lists every body’s gravity and the percentage of Earth weight, and the chart compares them side by side.
Your mass never changes — only the pull of gravity does. Gravity here is the mean surface value GM/R² from NASA fact sheets (at the 1-bar cloud level for the gas giants, which have no solid surface), ignoring the small effect of each world’s spin.
With the default inputs, the weight on selected world is 56.9. Change any value above to recalculate instantly.
How to use the weight on other planets calculator
- 1Enter your weight as measured on Earth.
- 2Choose pounds or kilograms — results use the same unit.
- 3Pick a world to highlight, such as Mars or the Moon.
- 4Read the highlighted result, then compare every planet and moon in the table and chart.
Formula and method
Weight is the force of gravity on your mass, W = m·g. Because your mass is the same everywhere, your weight on another world is simply your Earth weight multiplied by the ratio of the two surface gravities. Each surface gravity is the body’s gravitational parameter GM divided by the square of its mean radius R.
GM and mean radii come from the NASA NSSDCA fact sheets (planets, Moon, Pluto) and JPL’s satellite tables (Galilean moons and Titan); Earth’s mean value works out to 9.82 m/s². For the gas and ice giants the “surface” is the 1-bar pressure level. The numbers ignore rotation, which lowers effective gravity at the equator — by roughly 9% on fast-spinning Jupiter and 15% on Saturn, but well under 1% on Earth.
- W
- Weight (what a scale reads), in lb or kg
- g
- Mean surface gravity (m/s²)
- GM
- Gravitational parameter of the body
- R
- Mean radius of the body
Worked examples
150 lb person on Mars
Mars’s mean surface gravity is 3.73 m/s², 37.96% of Earth’s 9.82 m/s², so 150 lb becomes about 56.9 lb. The same person would weigh about 24.8 lb on the Moon and almost 396 lb at Jupiter’s cloud tops.
70 kg person on the Moon
The Moon’s gravity is 1.62 m/s², about 16.5% of Earth’s, so a 70 kg scale reading drops to about 11.6 kg. On Venus it would read 63.2 kg and on Saturn 79.7 kg.
100 lb on Jupiter’s moon Europa
Europa’s gravity is 1.31 m/s², 13.4% of Earth’s, so 100 lb reads about 13.4 lb. Of the giant planets, Uranus is closest to Earth-like at about 92 lb, while Neptune reads about 115 lb.
Frequently asked questions
How much would I weigh on Mars?+
About 38% of your Earth weight. Mars’s mean surface gravity is 3.73 m/s² versus Earth’s 9.82 m/s², so a 150 lb (68 kg) person would weigh about 57 lb (25.8 kg) on Mars.
How much would I weigh on the Moon?+
About 16.5% of your Earth weight — roughly one-sixth. The Moon’s surface gravity is 1.62 m/s², so 150 lb becomes about 25 lb and 70 kg becomes about 11.6 kg.
Does my mass change on other planets?+
No. Mass is the amount of matter in your body and is the same everywhere. Weight is the force gravity exerts on that mass, so it changes with each world’s surface gravity. A kitchen balance would read the same; a spring scale would not.
Which planet would I weigh the most on?+
Jupiter, at about 2.6 times your Earth weight at the 1-bar cloud level (about 2.3–2.4 times at the equator once its fast spin is included). Neptune and Saturn are next at roughly 1.15 and 1.14 times, despite Saturn’s huge size, because of their low density.
Can you stand on Jupiter or Saturn?+
No. The gas giants have no solid surface; the figures use gravity at the level where atmospheric pressure equals 1 bar, similar to Earth’s sea level. A probe sinking deeper would be crushed long before reaching any solid core.