Buoyancy Calculator
Use Archimedes' principle to find the buoyant force on a submerged object — and whether it floats or sinks.
Buoyant force
9.80665 N (2.20462 lbf)
- Mass of fluid pushed aside
- 1 kg (2.20462 lb)
The float check treats the volume as the object's whole volume. Uses standard gravity, 9.80665 m/s².
Show the work
Submerged volume in m³
m³ = L × 0.001
1 × 0.001 = 0.001 m³
Mass of fluid pushed aside
m = ρ × V
1,000 × 0.001 = 1 kg
Buoyant force = that fluid's weight
Fb = m × g
1 × 9.80665 = 9.80665 N (2.20462 lbf)
How it works
Buoyant force = ρ(fluid) × V(submerged) × g; it floats if its mass is less than ρ(fluid) × V
Questions
- How does the buoyancy calculator work?
- Buoyant force = ρ(fluid) × V(submerged) × g; it floats if its mass is less than ρ(fluid) × V.
- What do I need to enter?
- Fluid, Fluid density, Submerged volume, Submerged volume unit, Object mass, Object mass (optional) unit. Optional fields can be left blank.
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