Physics calculators

Speed, force, kinetic energy, power, density and pressure from textbook formulas in SI units.

Density calculator

Find density from mass and volume, and see how it compares with water.

Find the energy of a moving object from its mass and speed.

Find the net force from mass and acceleration with Newton’s second law.

Find average power in watts from the energy used and the time taken.

Find the pressure a force applies when it is spread over an area.

Find average speed from the distance travelled and the time it took.