Gravitational Force Calculator — F = Gm₁m₂/r²

Every pair of masses attracts each other with a force proportional to both masses and weakening with the square of the distance. G = 6.67430×10⁻¹¹ N·m²/kg² is built in.

Gravitational Force Calculator — F = Gm₁m₂/r²

$F = G\frac{m_1 m_2}{r^2}$

Solve for

Mass 1 (m₁)

Unit

Mass 2 (m₂)

Unit

Gravitational force (F)

Unit

Result unit

How to interpret the result

The attractive force between the masses — the same law that holds the Moon in orbit and makes apples fall. Doubling the distance quarters the force.

Assumptions

Point masses (or spherically symmetric bodies)
G = 6.67430×10⁻¹¹ N·m²/kg² (CODATA 2018)