Power from Force and Velocity Calculator

About this calculator

In mechanics, power is the rate at which work is done, and when a constant force acts on an object moving at a steady velocity in the same direction, that rate simplifies to P = F × v — force multiplied by velocity. This is the mechanical-power counterpart to the electrical formula P = V × I, and it applies directly whenever something is pushed, pulled, or driven at a known speed against a known resisting force.

This calculator multiplies a given force and velocity to find power, and presents the result in watts, horsepower, and kilowatts so it's usable across contexts. It's a core formula for mechanical and automotive engineers sizing motors, calculating the power a vehicle's engine must deliver to overcome drag or rolling resistance at a given speed, and analyzing machinery where a known force must be sustained at a known rate of motion.