Formula
Mechanical power is the rate of doing work:
Watts = joules / seconds
The wattage page multiplies voltage by current. This page does not use a circuit.
Assumptions
- Work is joules and time is seconds.
- The result is an average over that time.
Worked example
500 J in 10 s is 50 W.
Input definitions
- Work
- Energy transferred, in joules.
- Time
- How long that work takes, in seconds.
Limitations
This is a classroom calculation. It is not a laboratory procedure, a wiring plan, or a measured instrument reading.
Questions
Is a watt a joule per second?
Yes. That is the definition used here.
Can I enter electrical watts?
Use the wattage or electrical-power page. Those start from voltage and current or resistance.