Convert Horsepower to Kilowatts
1 horsepower (hp) equals 0.7456998716 kilowatts (kW).
1 hp = 0.7456998716 kW
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk horsepower to kilowatt converter to paste a column from Excel.
How to Convert Horsepower to Kilowatt
- 1 hp = 0.7456998716 kW
- 1 kW = 1.34102209 hp
- Example: convert 100 hp to kW: 100 hp = 100 × 0.7456998716 kW = 74.56998716 kW
Reference conditions. hp: Mechanical (imperial) horsepower, 550 ft·lbf/s. Metric horsepower (PS) is about 1.4 % smaller.
Formula
kW = hp × 0.7456998715823
or kW = hp ÷ 1.341022089595
Derivation from SI units:
- 1 hp = 550 ft·lbf/s = 745.69987158227 W
- 1 kW = 10³ W
- 1 hp = 745.6998715823 W ÷ 1000 W per kW = 0.7456998715823 kW
Both units are defined exactly, so the factor is exact. Horsepower definition: horsepower; Kilowatt definition: kilowatt.
Worked examples
- A 300 hp engine produces 223.7099615 kW.
300 hp × 0.7456998716 = 223.7099615 kW - A 5 hp motor is rated at 3.728499358 kW.
5 hp × 0.7456998716 = 3.728499358 kW
Horsepower to Kilowatt conversion table
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 0.25 hp | 0.1864249679 kW |
| 0.5 hp | 0.3728499358 kW |
| 1 hp | 0.7456998716 kW |
| 1.5 hp | 1.118549807 kW |
| 2 hp | 1.491399743 kW |
| 5 hp | 3.728499358 kW |
| 10 hp | 7.456998716 kW |
| 25 hp | 18.64249679 kW |
| 50 hp | 37.28499358 kW |
| 100 hp | 74.56998716 kW |
| 150 hp | 111.8549807 kW |
| 200 hp | 149.1399743 kW |
| 300 hp | 223.7099615 kW |
| 400 hp | 298.2799486 kW |
| 500 hp | 372.8499358 kW |
| 1000 hp | 745.6998716 kW |
Where it's used
Engine and motor ratings in horsepower are converted to kilowatts for international specifications and EU documents. 1 hp is about 0.7457 kW.
Horsepower to other power units
| Conversion | 1 hp equals |
|---|---|
| horsepower to watt | 745.6998716 W |
| horsepower to milliwatt | 745699.8716 mW |
| horsepower to kilowatt | 0.7456998716 kW |
| horsepower to megawatt | 0.0007456998716 MW |
| horsepower to metric horsepower | 1.013869665 PS |
| horsepower to BTU per hour | 2544.433578 BTU/h |
| horsepower to refrigeration ton | 0.2120361315 TR |
| horsepower to kilocalorie per hour | 641.186476 kcal/h |
| horsepower to foot-pound per second | 550 ft·lbf/s |
Frequently asked questions
How many kW is 1 hp?
1 mechanical hp = 0.7456998716 kW.
How many kilowatts are in 1 horsepower?
1 hp = 0.7456998716 kW.
How do I convert horsepower to kilowatts?
Multiply the value in hp by 0.7456998716, or divide it by 1.34102209. For example, 100 hp × 0.7456998716 = 74.56998716 kW.
Is the hp to kW conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "horsepower (550 ft·lbf/s)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Horsepower to Kilowatts. Retrieved October 17, 2026, from https://scientificconverters.com/power/horsepower-to-kilowatts/
IEEE
Scientific Converters, "Convert Horsepower to Kilowatts," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/power/horsepower-to-kilowatts/