⚙️ Work, Energy & Power

6 calculators in this category.

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Work out kinetic and potential energy, the work done by a force, power in watts and horsepower, the efficiency of a machine and the energy stored in a spring.

Calculate kinetic energy with KE = ½mv² from mass and speed in m/s, km/h or mph. Results in joules and kilojoules, plus momentum.

Potential Energy

Calculate gravitational potential energy with PE = mgh from mass, height and g. Also shows the speed the object would reach if it fell that height.

Calculate the work done by a force with W = F × d × cos θ from force, displacement and the angle between them. Result in joules.

Power (P = W/t)

Calculate power from work or energy and time with P = W ÷ t. Results in watts, kilowatts and horsepower.

Calculate the efficiency of a machine or device as useful output ÷ total input × 100%. Works with energy or power, and shows the energy wasted.

Find spring force, spring constant or extension with Hooke's law F = kx, plus the elastic potential energy stored in the spring.