The Planet's Mass from Acceleration and Radius calculator computes the mass of planet or moon based on the radius (r), acceleration due to gravity on the surface (a) and the.
INSTRUCTIONS: Choose units and enter the following:
Planetary Mass (M): The calculator returns the mass (M) in kilograms. However, this can be automatically converted into other mass units via the pull-down menu including the following:
This calculator computes the mass of a planet given the acceleration at the surface and the radius of the planet. The formula for the mass of a planet based on its radius and the acceleration due to gravity on its surface is:
M = a⋅r2/G
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