Buoyancy Calculator

Find the upward buoyant force on a submerged object from the fluid density and the volume of fluid that it displaces when immersed.

F_b = ρ × V × g

The buoyant force equals the weight of the fluid pushed aside, so denser fluids and larger volumes lift more.

Fluid density (kg/m³)

Displaced volume (m³)

Gravity (m/s²)

Buoyant force (N)

Buoyant force

… N

The calculation runs entirely in your browser, no data leaves your device. Change any number and the answer updates instantly.