Gravitational Force Calculator

Use Newton's law of universal gravitation to find the attraction between two masses

Inputs

Formula: F = G · m₁ · m₂ / r², where F is in Newtons when masses are in kilograms and distance is in meters.

Mass 1

Mass 2

Center-to-Center Distance

Gravitational Constant G (N·m²/kg²)

Default: 6.67430 × 10⁻¹¹

For astronomical bodies, expect very large or very small numbers expressed in scientific notation.
If objects are far apart, the force falls off with the square of the distance.
Use SI units to avoid rounding errors; conversions are applied automatically above.