About the Power Calculator
Power as work done per unit time (P = W/t) — solve for power, work or time, in watts and horsepower.
Also known as: power formula physics, watts from work, mechanical power.
How to use this calculator
- Enter solve for.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Power formula
P = W / t
Worked example
Using the values pre-filled in the calculator above:
- Solve for: Power
- Work / energy = 45,000 J
- Time = 60 s
the calculator returns:
- Power: 750 W
- Work / energy: 45,000 J
- Time: 60 s