Convert horsepower to watts
Enter the value to convert from horsepower to watt.
How to Convert Horsepower to Watt
Converting horsepower to watt is straightforward using our conversion calculator.
Conversion Formula
W = hp × 745.7Reverse conversion: Convert watts to horsepower
Comparison: Horsepower vs Watt
When to Use Each Unit
Horsepower: Standard for automotive engine power, industrial machinery, and mechanical power ratings in imperial countries.
Watt: Universal standard for electrical power ratings, mechanical power output, and energy transfer rates worldwide.
Common Conversion Values
- 1 hp ≈ 745.7 W
- 1 hp ≈ 0.746 kW
- 1 hp ≈ 1.014 metric hp
- 1 hp = 550 ft⋅lbf/s
About (symbol:
Definition: Horsepower (symbol: hp) is a unit of power originally based on the work rate of draft horses, equal to 745.7 watts.
History: Defined by James Watt in 1782 to market steam engines by comparing them to horse power for familiar reference.
Current Use: Standard for automotive engine power, industrial machinery, and mechanical power ratings in imperial countries.
Examples: Car engine: 100-500 hp, motorcycle: 20-200 hp, lawn mower: 3-25 hp, industrial motor: 1-1000 hp
About Watt
Definition: The watt (symbol: W) is the SI unit of power, equal to one joule per second or the rate of energy transfer.
History: Named after Scottish inventor James Watt in 1882. Standardized as SI unit to measure rate of energy consumption or production.
Current Use: Universal standard for electrical power ratings, mechanical power output, and energy transfer rates worldwide.
Examples: LED bulb: 10W, laptop: 65W, microwave: 1000W, hair dryer: 1500W, electric kettle: 2000W