Power converter
Horsepower to Kilowatts
Horsepower and Kilowatts measure the same quantity in different unit systems. The relationship is 1 hp = 0.74569987 kW, which gives 0.74569987 kW per hp. Below you can convert any value, check a worked example and read the full chart.
Formula 1 hp = 0.74569987 kW
Need the other direction? Kilowatts to Horsepower.
How to convert Horsepower to Kilowatts
Mechanical horsepower is about 745.7 watts; metric horsepower is about 735.5 watts. A kilowatt is 1,000 watts and is common for appliances and EV charging.
To convert Horsepower to Kilowatts, multiply the value in hp by 0.74569987. For example, 10 hp × 0.74569987 = 7.456999 kW. This works because the ratio between the two units is constant for every value in power.
Worked examples
| hp | kW |
|---|---|
| 1 hp | 0.74569987 kW |
| 2.5 hp | 1.86425 kW |
| 5 hp | 3.728499 kW |
| 10 hp | 7.456999 kW |
| 25 hp | 18.642497 kW |
| 50 hp | 37.284994 kW |
| 100 hp | 74.569987 kW |
Reverse conversion
| kW | hp |
|---|---|
| 1 kW | 1.341022 hp |
| 5 kW | 6.70511 hp |
| 10 kW | 13.410221 hp |
| 25 kW | 33.525552 hp |
| 50 kW | 67.051104 hp |
| 100 kW | 134.102209 hp |
When this conversion is useful
This is the calculation you need when you are comparing an engine, a generator or an appliance across standards. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 hp is 745.699872 kW.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
hp to kW conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 1 hp | 0.74569987 kW |
| 2 hp | 1.4914 kW |
| 3 hp | 2.2371 kW |
| 4 hp | 2.982799 kW |
| 5 hp | 3.728499 kW |
| 6 hp | 4.474199 kW |
| 7 hp | 5.219899 kW |
| 8 hp | 5.965599 kW |
| 9 hp | 6.711299 kW |
| 10 hp | 7.456999 kW |
| 11 hp | 8.202699 kW |
| 12 hp | 8.948398 kW |
| 13 hp | 9.694098 kW |
| 14 hp | 10.439798 kW |
| 15 hp | 11.185498 kW |
| 16 hp | 11.931198 kW |
| 17 hp | 12.676898 kW |
| 18 hp | 13.422598 kW |
| 19 hp | 14.168298 kW |
| 20 hp | 14.913997 kW |
| 21 hp | 15.659697 kW |
| 22 hp | 16.405397 kW |
| 23 hp | 17.151097 kW |
| 24 hp | 17.896797 kW |
| 25 hp | 18.642497 kW |
| 26 hp | 19.388197 kW |
| 27 hp | 20.133897 kW |
| 28 hp | 20.879596 kW |
| 29 hp | 21.625296 kW |
| 30 hp | 22.370996 kW |
| 31 hp | 23.116696 kW |
| 32 hp | 23.862396 kW |
| 33 hp | 24.608096 kW |
| 34 hp | 25.353796 kW |
| 35 hp | 26.099496 kW |
| 36 hp | 26.845195 kW |
| 37 hp | 27.590895 kW |
| 38 hp | 28.336595 kW |
| 39 hp | 29.082295 kW |
| 40 hp | 29.827995 kW |
| 41 hp | 30.573695 kW |
| 42 hp | 31.319395 kW |
| 43 hp | 32.065094 kW |
| 44 hp | 32.810794 kW |
| 45 hp | 33.556494 kW |
| 46 hp | 34.302194 kW |
| 47 hp | 35.047894 kW |
| 48 hp | 35.793594 kW |
| 49 hp | 36.539294 kW |
| 50 hp | 37.284994 kW |
| 60 hp | 44.741992 kW |
| 70 hp | 52.198991 kW |
| 80 hp | 59.65599 kW |
| 90 hp | 67.112988 kW |
| 100 hp | 74.569987 kW |
Frequently asked questions
How many Kilowatts are in 1 Horsepower?
1 hp equals 0.74569987 kW.
How do I convert Horsepower to Kilowatts?
Multiply the hp value by 0.74569987. Example: 25 hp = 18.642497 kW.
What is 2.5 hp in kW?
2.5 hp = 1.86425 kW.
Is the hp to kW conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.