Gravitation
A fuller guide to gravitational force, explaining inverse-square behaviour, centre-to-centre separation, and the difference between mass, weight, and interaction force.
Enter the known values to calculate gravitational force using a standard physics relationship.
Inputs
The strongest pages in the library pair the live calculator with a topic guide and, where it helps, a printable reference you can reuse offline.
Use this page when you know enough of the inputs to solve a standard gravitational force relationship.
These calculators follow the stated equation only. They do not model every real-world effect, simplification, or edge case.