Weight on Other Planets Calculator

Written byOleh Soloninupdated 25 September 2026

Your weight

Where you measured it

Result

On the Moon11.6
On Mars26.4
On Jupiter165.2
Your mass does not change70
Measured onEarth
Every body
Mercury: 26.5 Venus: 63.5 the Moon: 11.6 Mars: 26.4 Jupiter: 165.2 Saturn: 64.1 Uranus: 62.2 Neptune: 78.4 Pluto: 5 the Sun: 1960

Your mass is constant; your weight is local

Converts your weight to what a scale would read on the Moon, Mars, Jupiter and the rest of the solar system.

Mass is how much of you there is, and it does not change anywhere. Weight is the force your body presses on the ground with, and it depends entirely on the gravity where you are standing.

So the same person reads 70 on a scale on Earth, about 12 on the Moon, 26 on Mars and 165 on Jupiter — if you could stand on Jupiter, which has no surface to stand on.

How to use

Enter what your bathroom scale reads at home.
Leave the second field on Earth unless your figure was measured somewhere else.
Read the Moon, Mars and Jupiter, or the full list in the last field.
Note the mass field: it is the one number that does not change anywhere.

What a scale would read for 70 kilograms

Each row is a run of this calculator with 70 on Earth. The last column is the ratio of the two readings, which is also the ratio of the surface gravities.

Two rows go against intuition. Mercury and Mars read almost the same, 26.5 against 26.4, although Mars is about half again as wide — Mercury is far denser and makes up the difference. And Saturn reads less than Earth, 64.1, for a planet of 95 Earth masses, because its radius is nine and a half times ours and gravity falls with the square of the distance from the centre.

A run of this calculator with 70 on Earth.
Body	What the scale reads	Relative to Earth
the Moon	11.6	0.166
Mars	26.4	0.377
Mercury	26.5	0.378
Venus	63.5	0.907
Saturn	64.1	0.916
Jupiter	165.2	2.36

What this calculator shows

Your weight on the Moon, Mars and Jupiter
Your mass, which the change in gravity does not touch
The full table for every body in the list

What to keep in mind

The ratios come from NASA's Planetary Fact Sheet: gravity at the equator including rotation, and for the gas giants at the 1 bar pressure level, since there is no surface.
Latitude is not a choice: every body is taken at the equator, as in NASA's table. Nothing here says whether you could survive standing there, and mostly you could not.

FAQs

What is the difference between mass and weight?

Mass is measured in kilograms and never changes. Weight is a force, measured in newtons, and equals mass times the local gravity. Bathroom scales show weight but are labelled in kilograms, which is where the confusion comes from.

Why is the Moon a sixth of Earth?

It is both much smaller and less dense. Gravity depends on mass and on how close the surface is to the centre, and the Moon loses on both counts.

Why is Saturn's gravity almost Earth's?

Saturn is enormous but extremely light for its size — less dense than water. The huge mass and the huge radius nearly cancel out at the cloud tops.

Would I feel lighter on Mars?

Immediately. At 38 percent of Earth's gravity a step meant for Earth would launch you, which is exactly what the Apollo footage of the Moon shows.

Why do Mercury and Mars come out almost the same?

Because gravity depends on density as well as size. Mars is roughly half again as wide as Mercury, which would pull harder, but Mercury is made of much denser stuff — it has an outsized iron core. The two effects nearly cancel, and the scale reads 26.5 against 26.4.

What does the second field change?

It says which body your number was measured on. Leave it on Earth for a bathroom scale at home. Set it to the Moon and the tool treats your figure as a lunar reading, works back to the mass, and recomputes everything else from there — useful for a physics problem: the mass line shows the mass worked back from the reading, and the whole table follows from it.

Worked example

Seventy kilograms

Input: 70 kg measured on Earth

Output: 11.6 on the Moon, 26.4 on Mars

Note: Mars and Mercury come out almost identical — 0.377 against 0.378 of Earth's gravity — despite Mars being twice the mass, because Mercury is much denser and its surface much closer to its centre.

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