Physics Power: Work Divided by Time
Power is the rate of doing work. The same job done in half the time takes twice the power, and this calculator shows why.
What is the Physics Power Calculator?
Enter work in joules and time in seconds. Power in watts is work divided by time: the same work done faster means more power. All physics tools here use standard textbook formulas, labelled as such.
How to use it
- Enter the values in the labelled units.
- Click Calculate Power.
- Read the result and its formula.
Worked example
Doing 500 J of work in 10 seconds is 50 W of power.
What power is 500 J in 10 seconds?
50 watts, from 500 divided by 10.
Frequently asked questions
What units should I use?
Use the units on the labels (kg, m, s, N, J, W) so the formula's result comes out in standard units.
Is this exact?
The formula is standard textbook physics; real measurements carry their own errors, but the arithmetic is exact.