100% free · No sign-up · Runs in your browser
Convert horsepower to watts
Instant, accurate hp → W conversion with a live converter, table and formula.
=
1 horsepower = 745.7 watts
1 watt = 0.00134102 horsepower
horsepower to watts table
| horsepower (hp) | watts (W) |
|---|---|
| 0.5 | 372.85 |
| 1 | 745.7 |
| 2 | 1491.4 |
| 5 | 3728.5 |
| 10 | 7457 |
| 20 | 14914 |
| 50 | 37284.99 |
| 100 | 74569.99 |
| 500 | 372849.94 |
| 1000 | 745699.87 |
Formula
watts = horsepower × 745.7.
Example
10 horsepower = 7457 watts.
What is a horsepower?
Horsepower (hp) is about 746 watts, used for engines.
What is a watt?
The watt (W) is the SI unit of power (one joule per second).
Real-world reference points
An LED bulb draws ~9 W; a kettle ~2,000 W; a small car engine ~100 hp (~75 kW).
| Reference | horsepower | watts |
|---|---|---|
| LED bulb | 0.0121 hp | 9 W |
| Laptop charging | 0.0872 hp | 65 W |
| Microwave | 1.21 hp | 900 W |
| Electric kettle | 2.68 hp | 2,000 W |
| Small car engine (100 hp) | 100 hp | 74,570 W |
Mistakes to avoid with power conversions
- kW vs kWh again: power is the rate, energy is the amount — a 2 kW kettle for 6 minutes uses 0.2 kWh.
- Mixing metric and mechanical horsepower (~1.4% apart) when comparing engine specs across regions.
- Sizing inverters/generators on running watts while ignoring appliance startup surges.
Frequently asked questions
How many watts in a horsepower?+
1 horsepower = 745.7 watts.
How do I convert horsepower to watts?+
Enter the value in the horsepower box above and the watts value appears instantly. You can also type in the watts box to convert the other way.
Is this hp to W converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.