Convert watts to horsepower
Enter the value to convert from watt to horsepower.
How to Convert Watt to Horsepower
Converting watt to horsepower is straightforward using our conversion calculator.
Conversion Formula
hp = W ÷ 745.7Reverse conversion: Convert horsepower to watts
Comparison: Watt vs Horsepower
When to Use Each Unit
Watt: Universal standard for electrical power ratings, mechanical power output, and energy transfer rates worldwide.
Horsepower: Standard for automotive engine power, industrial machinery, and mechanical power ratings in imperial countries.
Common Conversion Values
- 1000 W = 1 kW
- 1 W ≈ 0.00134 hp
- 1 W ≈ 3.41 BTU/h
- 1 W ≈ 0.239 cal/s
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
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