Horsepower to Kilowatt (hp to kW)
Result
0.7456998716 Kilowatt
Formula
kW = hp × 0.7456998716
1 hp = 0.7456998716 kW, and 1 kW = 1.34102209 hp.
The watt is one joule per second. Mechanical horsepower is 550 foot-pound-force per second, which is 745.69987 W.
Worked examples
- 1 hp × 0.7456998716 = 0.74569987 kW
- 10 hp × 0.7456998716 = 7.4569987 kW
- 100 hp × 0.7456998716 = 74.569987 kW
Common mistakes
- Horsepower comes in several sizes: mechanical (745.7 W), metric/PS (735.5 W) and electrical (746 W). Car specifications in Europe and Japan usually quote PS.
- Power (W) is a rate; energy (Wh, J) is power × time.
Horsepower to Kilowatt table
| Horsepower (hp) | Kilowatt (kW) |
|---|---|
| 1 | 0.74569987 |
| 2 | 1.4913997 |
| 5 | 3.7284994 |
| 10 | 7.4569987 |
| 20 | 14.913997 |
| 50 | 37.284994 |
| 100 | 74.569987 |
| 1,000 | 745.69987 |
The units
- Horsepower (hp)
- 1 Horsepower = 745.6998716 Watt.
- Kilowatt (kW)
- 1 Kilowatt = 1,000 Watt.
Sources for these factors
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
- The International System of Units (SI Brochure), 9th edition — BIPM
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy