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Mihsaba›Buoyant Force Calculator

Buoyant Force Calculator

Calculate buoyant force from fluid density, displaced volume and gravity, plus displaced-fluid mass.

These are ideal fluid models; viscosity, losses, friction, compressibility and real-system efficiency are excluded unless stated.

How to use

By Archimedes’ principle, buoyant-force magnitude equals the weight of displaced fluid in the static-fluid model.

  1. Enter fluid density.
  2. Enter displaced volume and gravity.
  3. Review force and displaced-fluid mass.

How it is calculated

Fb=ρfluid·g·Vdisplaced

Example

Displacing 0.01 m³ of water corresponds to 10 kg of displaced fluid and about 98.1 N buoyancy.

Important notes

Actual equilibrium also depends on object weight, geometry and immersion.

Frequently asked questions

Whole object volume?

Use the actually displaced/submerged volume.

Does depth matter?

For constant-density incompressible fluid, displaced volume dominates.

Direction?

Usually upward in hydrostatic conditions.