How to convert horsepower to kilowatts
One horsepower equals 0.7457 kilowatts, so multiply the number of horsepower by 0.7457:
kW = hp × 0.7457
hp = kW ÷ 0.7457 (1 kW = 1.341 hp)
Example: 15 hp → 15 × 0.7457 = 11.1855 kW.
Going the other way, divide by 0.7457, or multiply by 1.341; the kilowatts to horsepower converter does it for you.
Everyday values
| Horsepower | Kilowatts | For example |
|---|---|---|
| 15 hp | 11.1855 kW | a 125 cc motorcycle, roughly |
| 100 hp | 74.57 kW | a small family car |
| 200 hp | 149.14 kW | a sporty car |
| 400 hp | 298.28 kW | a sports car |
| 1,000 hp | 745.7 kW | a hypercar |
When you need this conversion
This converter uses mechanical (imperial) horsepower, 745.7 W. European "PS" or "CV" is slightly smaller at 735.5 W, so 100 PS is 73.5 kW while 100 hp is 74.6 kW. Electric motors are usually rated directly in kW.
Horsepower to kilowatt conversion table
| hp | kW | hp | kW |
|---|---|---|---|
| 10 hp | 7.457 kW | 110 hp | 82.027 kW |
| 20 hp | 14.914 kW | 120 hp | 89.484 kW |
| 30 hp | 22.371 kW | 130 hp | 96.941 kW |
| 40 hp | 29.828 kW | 140 hp | 104.398 kW |
| 50 hp | 37.285 kW | 150 hp | 111.855 kW |
| 60 hp | 44.742 kW | 160 hp | 119.312 kW |
| 70 hp | 52.199 kW | 170 hp | 126.769 kW |
| 80 hp | 59.656 kW | 180 hp | 134.226 kW |
| 90 hp | 67.113 kW | 190 hp | 141.683 kW |
| 100 hp | 74.57 kW | 200 hp | 149.14 kW |
About the units
- Horsepower (hp): mechanical horsepower, 550 foot-pounds per second, about 745.7 W.
- Kilowatt (kW): 1,000 watts.
Both are units of power. The conversion factor comes from the exact definitions above, so the calculator is exact; results are only rounded for display (up to six significant digits).
Frequently asked questions
How many kilowatts are in one horsepower?
One horsepower is 0.7457 kilowatts. One kilowatt is 1.341 horsepower.
How do I convert horsepower to kilowatts?
Multiply the value in horsepower by 0.7457. To go back, divide by 0.7457.
What is 15 hp in kilowatts?
15 hp = 11.1855 kW.
What is 100 hp in kilowatts?
100 hp = 74.57 kW.
Sources
- NIST Special Publication 811 (2008), Guide for the Use of the International System of Units (SI), Appendix B: conversion factors.
- NIST Handbook 44 (2024), Appendix C: General tables of units of measurement.
Last reviewed 5 October 2026. Results are estimates; see our disclaimer.