Power conversion
6 units, with W as the base. Every value in the factor table is the number you multiply by, so reading across a row converts out of that unit and reading down a column converts into it.
The hp here is mechanical horsepower, 550 ft·lbf/s, which is 745.7 W. Metric horsepower (PS) is 735.49875 W and electrical horsepower is 746 W, so check which one a motor rating uses.
Factor table
| from \ to | µW | mW | W | kW | MW | hp |
|---|---|---|---|---|---|---|
| µW | 1 | 0.001 | 1 × 10⁻⁶ | 1 × 10⁻⁹ | 1 × 10⁻¹² | 1.34102 × 10⁻⁹ |
| mW | 1000 | 1 | 0.001 | 1 × 10⁻⁶ | 1 × 10⁻⁹ | 1.34102 × 10⁻⁶ |
| W | 1 × 10⁶ | 1000 | 1 | 0.001 | 1 × 10⁻⁶ | 0.00134102 |
| kW | 1 × 10⁹ | 1 × 10⁶ | 1000 | 1 | 0.001 | 1.34102 |
| MW | 1 × 10¹² | 1 × 10⁹ | 1 × 10⁶ | 1000 | 1 | 1341.02 |
| hp | 7.457 × 10⁸ | 745,700 | 745.7 | 0.7457 | 7.457 × 10⁻⁴ | 1 |
Prefixes such as milli, micro and kilo follow the SI prefixes table.
The values are facts and free to use; this table’s selection and presentation are © 2026 ScienceQuest.
Common conversions
hp to kW
1 hp = 0.7457 kW. In reverse, 1 kW = 1.34102 hp.
| hp | kW |
|---|---|
| 1 | 0.7457 |
| 5 | 3.7285 |
| 10 | 7.457 |
| 50 | 37.285 |
| 100 | 74.57 |
| 500 | 372.85 |
Worked example
- 1 hp in kW
- = 1 × 0.7457
- = 0.7457 kW
Convert a number
The table gives the factor; the unit converter does the arithmetic, remembers the units you picked, and turns any conversion into a link you can share.