Weight on Other PlanetsFree online science calculator — instant results, no sign-up
See how much you would weigh on other planets and moons.
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About the Weight on Other Planets
The Weight on Other Planets calculator compares your Earth weight with what an Earth-calibrated scale would indicate on other planets and moons. Enter your weight in kilograms to see kg-equivalent results for destinations including the Moon, Mars, Venus, Jupiter, Saturn, and Mercury. These readings change with local gravity; your mass does not.
- Your weight on Earth (kg)
- Enter your Earth scale reading in kilograms (kg); the default is 70 kg.
Formula and method
W_p = round(W_E × r_p, 2), where r_p = g_p / g_E.
- W_pThe destination's displayed weight in kg-equivalent, rounded to two decimal places.
- W_EYour entered Earth scale reading in kilograms.
- r_pThe dimensionless gravity multiplier for the selected planet or moon relative to Earth.
- g_pThe destination's adopted reference gravitational acceleration, in meters per second squared.
- g_EEarth's adopted reference gravitational acceleration, in meters per second squared.
The calculator multiplies your Earth reading by each destination's gravity multiplier and rounds the result to two decimal places. With the default input of 70 kg, the results are: On Moon = 11.56 kg-equivalent; On Mars = 26.48 kg-equivalent; On Venus = 63.31 kg-equivalent; On Jupiter = 176.95 kg-equivalent; On Saturn = 74.52 kg-equivalent; On Mercury = 26.41 kg-equivalent.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Your weight on Earth70 kg
Results
- On Moon11.56 kg-equivalent
- On Mars26.48 kg-equivalent
- On Venus63.31 kg-equivalent
- On Jupiter176.95 kg-equivalent
- On Saturn74.52 kg-equivalent
- On Mercury26.41 kg-equivalent
How to use the Weight on Other Planets
- 1Enter your Earth scale reading in the “Your weight on Earth (kg)” field, or keep the default of 70.
- 2Read the calculated row for each planet or moon.
- 3Compare each kg-equivalent reading with your Earth input: a smaller reading indicates weaker gravity, while a larger reading indicates stronger gravity.
- 4For the default input, check that the Moon row reads 11.56 kg-equivalent and the Jupiter row reads 176.95 kg-equivalent.
- 5Change the Earth input to compare another person's or object's weight while keeping the same destination gravity ratios.
Reading your result
Each output row names a destination and shows the weight force there expressed as an equivalent Earth scale reading. For the default 70 kg input, On Mars = 26.48 kg-equivalent means you would experience the same weight force as a 26.48 kg mass does on Earth. It does not mean your mass becomes 26.48 kg: your mass remains 70 kg. Weight as a force is measured in newtons; kg-equivalent is used here for an intuitive comparison.
Limitations
The results assume fixed reference gravity values rather than gravity at a specific landing site. Actual readings vary with altitude, latitude, rotation, and local conditions. Jupiter and Saturn have no solid surface to stand on, so their outputs represent reference-level gravity comparisons, not practical surface scale readings. The supplied example does not specify the underlying gravity constants, and other tables may produce slightly different rounded results. This tool does not model orbital weightlessness or spacecraft acceleration.
Common questions
Would my mass really fall to 11.56 kg on the Moon?+
No. With the default Earth input, your mass remains 70 kg. The Moon result of 11.56 kg-equivalent describes the lower weight force caused by lunar gravity.
Why does Jupiter show 176.95 kg-equivalent while Saturn shows 74.52 kg-equivalent?+
Their adopted reference gravitational accelerations differ. Gravity depends on both a planet's mass and the distance from its center, not mass alone. For the default 70 kg input, Jupiter's reference gravity produces a much larger reading than Saturn's.
Can I stand on Jupiter or Saturn to measure these weights?+
No. Neither planet has a solid surface like Earth's. Their rows compare gravity at an adopted reference level in the atmosphere rather than describing somewhere you could place a bathroom scale.
Why are the Mars and Mercury results almost the same?+
Their reference surface gravities are very similar despite their different sizes and masses. For the default 70 kg input, Mars gives 26.48 kg-equivalent and Mercury gives 26.41 kg-equivalent.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
Further reading
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Results are estimates for informational purposes and are not financial, medical or legal advice.