Power Calculator

Use P = W/t and convert the result between watts, kilowatts, mechanical horsepower, and metric horsepower.

Work / energy

Elapsed time

—W

—kW

—mechanical hp

—metric PS

—P = W / t

These are idealized classical-physics calculations. Real systems can differ because of air resistance, friction, deformation, measurement uncertainty, non-constant forces, or other effects not included in the selected model.

How to use this Power Calculator

Calculate average mechanical power from work or energy and elapsed time. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.