Weight on Planets

The weight on other planets calculator shows how much a body would weigh on the Moon, Mars, Jupiter, the Sun and other bodies of the Solar System, and what an ordinary scale would show. The solution uses the weight formula P = m · g.

Mass and weight

Mass measures the inertia of a body; it is the same everywhere and is measured in kilograms. Weight is the force with which a body presses on its support; it depends on the gravitational acceleration and is measured in newtons:

P = m · g

A bathroom scale actually measures weight and converts it to kilograms for Earth's g = 9.81 m/s². That is why on the Moon it would show about 6 times less.

Gravitational acceleration

The gas giants and the Sun have no solid surface, so g is given at the visible surface (cloud tops, photosphere).

Example. A 60 kg astronaut on the Moon: P = 60 · 1.62 = 97.2 N; the scale shows 97.2 / 9.81 ≈ 9.9 kg.