Why do some objects float and others sink?

An object floats if the buoyant force equals or exceeds its weight; this happens when the object's average density is less than the fluid's density.

Buoyancy Force Calculator

Using Archimedes' principle, calculate the upward buoyant force on an object based on the fluid it displaces.

Inputs

Results

Buoyant Force: 490 N

Try an example

Formula

F = ρ × V × g

Learn How This Works

Fluid and Motion Physics: Buoyancy, Terminal Velocity, and Reynolds Number

Buoyancy force, terminal velocity, escape velocity, and Reynolds number — four calculations describing how objects move through fluids and gravity fields.

Frequently Asked Questions

Related Calculators

Density Calculator

Calculate density from mass and volume.

Speed, Distance & Time Calculator

Calculate speed from distance and time traveled.

pH Calculator

Calculate pH from hydrogen ion concentration.

Half-Life Calculator

Calculate remaining quantity of a substance after radioactive or exponential decay.

Wavelength & Frequency Calculator

Calculate the frequency of a wave from its wavelength, or vice versa.

Specific Heat Calculator

Calculate the heat energy needed to change a substance's temperature.