The Physics of the Universe
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Weight on Other Planets Calculator

See how much you would weigh across the solar system. Enter your mass (in kg or lb) and pick a world — the calculator multiplies by that body's surface gravity to give your weight there.

 

Formula

$$ W = m \times g_{body} \qquad \text{scale reading} = m \times \dfrac{g_{body}}{g_{Earth}} $$
g values in m/s²; Earth g = 9.807

Worked example

A 70 kg person weighs \( 70 \times 9.807 \approx 686\ \text{N} \) on Earth, but only \( 70 \times 1.62 \approx 113\ \text{N} \) on the Moon — a scale there would read about 11.6 kg, roughly one sixth of their Earth weight.

How it works

Your mass never changes, but your weight — the gravitational force on you — depends on the local surface gravity g. Weight is W = m·g, so on a world with weaker gravity you weigh less, and on a stronger one you weigh more.

Enter your mass and choose a body; the calculator gives your weight there in newtons and the equivalent reading on an Earth-calibrated scale (in kg). On Jupiter you would weigh about 2.5× your Earth weight; on the Moon only about a sixth.

Frequently asked questions

How do you calculate your weight on another planet?

Multiply your mass by that planet's surface gravity: W = m·g. Since your mass stays the same, your weight scales directly with the local gravity.

Why do I weigh less on the Moon?

The Moon's surface gravity is about 1.62 m/s², roughly one sixth of Earth's 9.81. So your weight there is about one sixth, even though your mass is unchanged.

Does my mass change on other planets?

No. Mass is the amount of matter in you and is the same everywhere. Only weight, the gravitational force, changes with the local gravity.

Where would I weigh the most?

Of the worlds listed, the Sun by far — its surface gravity is about 274 m/s², so you would weigh roughly 28× your Earth weight. Among planets, Jupiter is highest at about 2.5×.

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