Gravitational Acceleration is the acceleration of an object caused by the force of gravity from another object.

G = Universal Gravitational Constant = 6.6726 x 10^{-11}N-m^{2}/kg^{2}
M = Planet Mass
r = Radius from Planet Center

What is the acceleration due to gravity on Earth?
Mass of the earth = 5.98x10^{24} kg, Radius of the earth = 6378100 m,
G = 6.6726 x 10^{-11}N-m^{2}/kg^{2}.

Substitute the values in the below Gravitational Acceleration formula:

This example will guide you to calculate the Gravitational Acceleration manually.

Determine the Moon's radius? The gravitational acceleration of the moon is 1.63 m/s^{2}
Mass of moon = 7.36 x 10^{22} kg, a = 1.63 m/s^{2},
G = 6.6726 x 10^{-11}N-m^{2}/kg^{2}.

Substitute the values in the below Radius formula:

This example will guide you to calculate the Radius of the Moon manually.

This tutorial will help you dynamically to find the Gravitational Acceleration problems.