Joules to Watts Calculator
Find average power from transferred energy and elapsed time.
Formula
Pavg = E/t
Transferred energy: 600 J · Time interval: 30 s · Average power ≈ (600 J)÷(30 s)
How to use
- Enter energy in joules or kilojoules.
- Enter a positive time interval.
- Read average power in watts.
Examples
- 600 J over 30 s gives 20 W.
Frequently asked questions
Can joules alone determine watts?
No. You must supply a time interval.
Is this peak power?
No. It is the average over the entered duration.
What does one watt mean?
One joule transferred per second.
Sources
Updated: