Horsepower to Watts
Convert between horsepower and watts or kilowatts instantly.
Horsepower to watts converter
Enter a power value in horsepower to convert it to watts.
Supports decimals such as 0.5, 1.25, or 100.
Common in US/UK engine, motor, and equipment ratings.
Converted watts
745.6999 W
1 hp converted using 745.699872 W per hp.
Original value
1 hp
Input value.
Horsepower type
Mechanical horsepower
Common in US/UK engine, motor, and equipment ratings.
Conversion factor
1 hp = 745.699872 W
Selected horsepower definition.
Equivalent watts
745.6999 W
SI power unit.
Equivalent kilowatts
0.7457 kW
Useful for EVs, motors, and appliances.
Reverse conversion
1 hp
Watts divided by conversion factor.
Local conversion
All horsepower and watt conversions run instantly in the browser.
Engineering-friendly
Supports mechanical, metric, and electrical horsepower definitions.
Motor-ready
Useful for engines, motors, generators, HVAC, appliances, and EV power ratings.
Dynamic Conversion Insights
What Horsepower and Watts Measure
Power
Horsepower and watts both measure power.
Work rate
Power is the rate at which work is done or energy is transferred.
Horsepower
Common for engines, motors, pumps, and equipment.
Watts
The SI unit of power.
Kilowatts
Often used for larger power ratings.
Mechanical Horsepower vs Metric Horsepower
Mechanical horsepower
Common in US and UK contexts. 1 mechanical hp is approximately 745.7 W.
Metric horsepower
May appear as PS, CV, or ch depending on region. 1 metric hp is approximately 735.5 W.
Power vs Energy Explained
Power
Horsepower and watts measure power. Power is a rate.
Energy
Watt-hours and kilowatt-hours measure energy used over time.
Example: a 1,000 W device running for 1 hour uses 1 kWh of energy.
Motors, Engines, and Appliance Use Cases
Motors
Engines
Generators
Equipment specs
Common Horsepower-to-Watts Examples
| Mechanical horsepower | Watts |
|---|---|
| 1 hp | 745.70 W |
| 5 hp | 3,728.50 W |
| 10 hp | 7,456.99 W |
| 50 hp | 37,284.99 W |
| 100 hp | 74,569.99 W |
1 hp ≈ 0.746 kW
10 hp ≈ 7.46 kW
Formula Explanation
Watts = Horsepower × 745.6998715822702
Horsepower = Watts ÷ 745.6998715822702
Kilowatts = Watts ÷ 1,000
For metric horsepower: Watts = Metric Horsepower × 735.49875
For electrical horsepower: Watts = Electrical Horsepower × 746
Horsepower is the input power value. Mechanical, metric, and electrical horsepower use slightly different conversion factors. Watts are the SI output unit. Horsepower definitions can vary, so check whether a spec uses mechanical horsepower, metric horsepower, or electrical output ratings before comparing equipment. For more power and unit pairs, open the unit converter hub.
Frequently Asked Questions
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