Horsepower to Kilowatts
Mechanical horsepower, about 745.7 watts, is the traditional unit for rating car and engine power in the US and UK. A kilowatt is 1,000 watts, used to rate electric motors, appliances, and EV charging speeds. 1 hp equals ≈0.7457 kW, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to power, measured here against power's base unit (W) — every other power unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
kW = hp × ≈0.7457
hp = kW × ≈1.34102
Worked example: 5 hp × ≈0.7457 = ≈3.7285 kW.
Conversion table
| Horsepower (mech.) (hp) | Kilowatt (kW) |
|---|---|
| 1 hp | ≈0.7457 kW |
| 2 hp | ≈1.4914 kW |
| 3 hp | ≈2.2371 kW |
| 5 hp | ≈3.7285 kW |
| 10 hp | ≈7.457 kW |
| 20 hp | ≈14.914 kW |
| 25 hp | ≈18.6425 kW |
| 50 hp | ≈37.285 kW |
| 100 hp | ≈74.57 kW |
| 250 hp | ≈186.425 kW |
| 500 hp | ≈372.85 kW |
| 1,000 hp | ≈745.7 kW |
Frequently asked
- How many Kilowatts in a horsepower (mech.)?
- 1 hp equals ≈0.7457 kW.
- How do I convert Horsepower to Kilowatts?
- Multiply the value in hp by ≈0.7457 to get kW. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Horsepower (mech.) and Kilowatt are both defined by a fixed conversion factor to power's base unit (W), so the result shown is exact to the precision displayed, not an approximation.