Convert Horsepower to Watts
Convert horsepower to watts instantly. Type a value below, check the formula and table, then see how the same hp to W conversion looks as a single line in Notes Calculator.
In Notes Calculator, type 100 hp to W and the answer appears as you type.
Horsepower to Watts formula
One horsepower is 745.7 watts, so W = hp × 745.7. For the reverse, multiply watts by 0.00134102, or use the Watts to Horsepower converter.
Horsepower to Watts conversion table
| Horsepower (hp) | Watts (W) |
|---|---|
| 1 | 745.7 |
| 2 | 1,491.4 |
| 5 | 3,728.5 |
| 10 | 7,457 |
| 20 | 14,914 |
| 25 | 18,642.5 |
| 50 | 37,285 |
| 100 | 74,570 |
| 250 | 186,425 |
| 500 | 372,850 |
| 1,000 | 745,700 |
Horsepower to Watts in Notes Calculator
Notes Calculator is a notepad that does math. Write 100 hp to W on any line and the answer appears beside it. Change the number and the result follows. The same works with in and as, and with values stored in variables, so a whole estimate can mix horsepower and watts without a separate converter.
| Note | Result |
|---|---|
| 100 hp to W | 74,570 W |
| 100 hp in W | 74,570 W |
| 10 W as hp | 0.01 hp |
See the unit conversion docs for mixing units in one expression, or open the free web app and try it.
Notes Calculator is a notepad calculator for the web and a calculator app for Mac, Windows, Linux, iOS and Android.
FAQ
Frequently asked questions
How many watts are in one horsepower?
One horsepower equals 745.7 watts. To convert horsepower to watts, multiply by 745.7; to go back, multiply by 0.00134102.
How do I convert horsepower to watts in Notes Calculator?
Type the value, the unit, and the target unit on one line: 100 hp to W. The keywords to, in, and as all work, and the result updates as you type. You can also keep the value in a variable and convert it later.
Is this horsepower to watts converter free?
Yes. The converter on this page is free, and Notes Calculator has a free plan for the web, Mac, Windows, Linux, Android, and iOS with the same unit conversions built in.
Convert horsepower to watts without leaving your notes.
Notes Calculator is free to start and runs in your browser. Units, currencies, percentages, and variables in one plain-text notepad.
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