Weight on other planets: W = mg

Pick a planet and a mass to see the weight there. Mass stays the same everywhere; weight depends on the gravitational field strength.

Works in metric or imperial units.

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Questions students ask

What is the difference between mass and weight?

Mass is the amount of matter, in kilograms, and is the same everywhere. Weight is the force of gravity on that mass, in newtons, and changes from planet to planet.

What formula does it use?

W = mg: weight (N) = mass (kg) × gravitational field strength (N/kg).

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