How to convert kilowatts to horsepower
Apply the documented kilowatts-to-horsepower relationship below, keeping the full stored constant until the displayed result is rounded.
Kilowatts × 1.34102209 = Horsepower
For example, 10 kW equals 13.4102209 hp.
Kilowatts to Horsepower reference table
| Kilowatts | Horsepower |
|---|---|
| 1 kW | 1.34102209 hp |
| 5 kW | 6.70511045 hp |
| 10 kW | 13.4102209 hp |
| 25 kW | 33.52555225 hp |
| 50 kW | 67.0511045 hp |
| 100 kW | 134.102209 hp |
Method and quality checks
- Calculation
- Kilowatts × 1.34102209 = Horsepower. The calculator keeps the stored factor through the operation and rounds only the displayed result to the selected or page-supported precision.
- Unit convention
- Power is a rate of energy transfer. A power value cannot be compared directly with an energy total such as kWh.
- Input validation
- Finite numeric inputs are accepted. Results outside the supported numeric range are rejected instead of being displayed as valid measurements.
- Reasonableness check
- 10 kW produces 13.4102209 hp. Check the direction and approximate scale before relying on a more precise displayed value.
Deeper method: How significant figures work.
Kilowatts compared with mechanical horsepower
This page uses mechanical horsepower, approximately 745.699872 watts per horsepower. One kilowatt therefore equals approximately 1.34102209 mechanical horsepower; metric horsepower and electrical horsepower use different definitions.
- Confirm that a specification means mechanical horsepower rather than metric horsepower or PS.
- Compare input and output ratings only when efficiency and measurement conditions are understood.
- Vehicle peak-power ratings do not describe power available at every engine speed.
Reference: NIST power conversion factors.