Live Converter
Convert Power Online
Enter your value above to convert horsepower to watts or vice versa.
Real-World Examples
The Uses of Horsepower to Watts Conversion
Horsepower is the traditional unit for rating engines and motors, so this conversion is most useful when comparing against an electric motor or electrical supply figure given in watts.
Comparing Engine Output to Electric Motor Ratings
Automotive engineers who know an electric motor's rated power output in watts convert a gasoline engine's horsepower rating into watts to compare the two power sources directly.
Sizing an Electric Vehicle Motor Against a Combustion Engine
EV designers who target matching a conventional vehicle's horsepower rating convert that figure into watts to select an electric motor with equivalent rated output.
Checking Industrial Pump Motor Specifications
Facility engineers who size industrial pumps and compressors rated in horsepower convert the figure into watts to cross-check against the electrical supply capacity available on site.
Quick Reference
Comprehensive Conversion Table
Our quick table gives you instant results, so you don't have to calculate these common values manually.
| Conversion | Formula | Result (W) |
|---|---|---|
| 1 hp to W | 1 × 745.699872 | 745.70 W |
| 2 hp to W | 2 × 745.699872 | 1,491.40 W |
| 3 hp to W | 3 × 745.699872 | 2,237.10 W |
| 5 hp to W | 5 × 745.699872 | 3,728.50 W |
| 10 hp to W | 10 × 745.699872 | 7,457.00 W |
| 20 hp to W | 20 × 745.699872 | 14,914.00 W |
| 50 hp to W | 50 × 745.699872 | 37,284.99 W |
| 100 hp to W | 100 × 745.699872 | 74,569.99 W |
| 500 hp to W | 500 × 745.699872 | 372,849.94 W |
Got Questions?
Frequently Asked Questions
How many watts are in 1 horsepower?
1 horsepower equals 745.7 watts, a figure useful for anyone working at the engine and motor output ratings scale.
How many horsepower are in 1 watt?
1 watt equals approximately 0.00134102 horsepowers, which puts the size of a single watt into perspective against the horsepower.
Why would anyone convert horsepower to watts?
This comes up whenever an engine or motor rated in horsepower needs to be compared against an electric motor or electrical supply figure, both of which are commonly rated in watts.
Which definition of horsepower does this converter use?
This converter uses the standard mechanical horsepower (745.699872 watts), the figure most commonly used in engineering comparisons between engines and electric motors.