Science & engineering
Buoyant force calculator
Find ideal buoyancy from displaced fluid volume and density.
A clear answer. Here’s how.
Archimedes’ principle: buoyant force = fluid density × displaced volume × gravity. Converts litres to cubic metres. Uses displaced volume, which may be smaller than the object’s total volume; assumes uniform fluid density.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Fluid density (kg/m³)
- 1000
- Displaced fluid volume (litres)
- 5
- Gravitational acceleration (m/s²)
- 9.80665
Example result
- Buoyant force (N)
- 49.03325
- Displaced fluid mass (kg)
- 5