Power Calculator
Electrical and mechanical power, energy and running cost.
J
s
per kWh
Power
60W
Kilowatts
0.06kW
Horsepower
0.080461hp
Cost to run 1 hour
0.018
ShowHide the working
- 1P = E ÷ t = 3,600 ÷ 60 = 60 W
Formula
P = E ÷ tHow it works
Power is the rate of doing work — one watt is one joule per second. Add a price to see the running cost.
Example
3,600 J in 60 s is 60 W.
About the Power Calculator
Electrical and mechanical power, energy and running cost. It sits in the Physics & Engineering section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Power Calculator free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Power Calculator runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Power Calculator on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Physics & Engineering?
- Motion, force, energy, electricity and wave calculations. You can browse the full Physics & Engineering category for related calculators.