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Fluid Mechanics Calculators

Buoyancy Calculator

Archimedes' principle: buoyant force, apparent weight and whether an object floats or sinks.

Also known as archimedes principle, buoyant force, will it float.

Enter values

Results update as you type.

Result

Buoyant force

490.33 N

Object weight
343.23 N
Result
Floats
Apparent weight in fluid
0 N
Submerged when floating
70%

About the Buoyancy Calculator

Archimedes' principle: buoyant force, apparent weight and whether an object floats or sinks.

Also known as: archimedes principle, buoyant force, will it float, displacement force.

How to use this calculator

  1. Enter object volume, object density, fluid density.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Buoyancy formula

F_b = ρ_fluid × g × V_displaced

Worked example

Using the values pre-filled in the calculator above:

  • Object volume = 0.05 m³
  • Object density = 700 kg/m³
  • Fluid density = 1,000 kg/m³

the calculator returns:

  • Buoyant force: 490.33 N
  • Object weight: 343.23 N
  • Result: Floats
  • Apparent weight in fluid: 0 N