Overview
What Is a Power Calculator?
This tool calculates power using the formula power = work ÷ time, measured in Watts.
Calculate power from work and time.
This tool calculates power using the formula power = work ÷ time, measured in Watts.
Useful for mechanics coursework involving energy, work, and power relationships.
Input the work in Joules.
Input the time in seconds.
The result in Watts updates automatically.
Power = Work ÷ Time
Work in Joules, time in seconds, and power in Watts.
The SI unit of power, equal to 1 Joule of work per second.
1 horsepower is approximately 746 Watts - divide your Watts result by 746 for an approximate horsepower equivalent.
In some contexts (like work being removed from a system) negative values could apply, though this basic calculator assumes standard positive work.
No, calculations happen entirely in your browser.
Engine ratings, electrical appliance power consumption, and mechanical system design all use power calculations.
The concept is related - electrical power uses P=VI (voltage times current), while this is the mechanical work-based definition.
Not necessarily - power is the rate of energy use, while total energy also depends on how long that power is sustained.
Yes, completely free with no sign-up required.