Gravitational Force Calculator

Use F = Gm₁m₂/r² with adjustable mass and separation units.

Mass 1

Mass 2

Center-to-center distance

—force N

—force kN

—force lbf

—G used

—Newtonian point-mass model: F = Gm₁m₂/r².

These are idealized classical-physics calculations. Real systems can differ because of air resistance, friction, deformation, measurement uncertainty, non-constant forces, or other effects not included in the selected model.

How to use this Gravitational Force Calculator

Calculate Newtonian gravitational force between two masses. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.