Home › Unit Conversion › Horsepower (mechanical) to Kilowatts
Horsepower (mechanical) to Kilowatts (hp to kW)
Convert horsepower (mechanical) to kilowatts: 1 hp = 0.7457 kW. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 hp = 0.7457 kW
kilowatts = horsepower (mechanical) × 0.7456998716 — reverse: horsepower (mechanical) = kilowatts × 1.34102209
The factor is derived from the SI definitions of both units (base unit: W) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 hp = 3.7285 kW
- 12.5 hp = 9.32125 kW
- 100 hp = 74.57 kW
Horsepower (mechanical) to kilowatts conversion table
| Horsepower (mechanical) (hp) | Kilowatts (kW) |
|---|---|
| 1 | 0.7457 |
| 2 | 1.4914 |
| 3 | 2.2371 |
| 4 | 2.9828 |
| 5 | 3.7285 |
| 6 | 4.4742 |
| 7 | 5.2199 |
| 8 | 5.9656 |
| 9 | 6.7113 |
| 10 | 7.457 |
| 15 | 11.1855 |
| 20 | 14.914 |
| 25 | 18.6425 |
| 30 | 22.371 |
| 40 | 29.828 |
| 50 | 37.285 |
| 75 | 55.9275 |
| 100 | 74.57 |
| 200 | 149.14 |
| 250 | 186.425 |
| 500 | 372.85 |
| 1000 | 745.7 |
FAQ
How many kilowatts are in one horsepower?
1 hp = 0.7457 kW. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert horsepower (mechanical) to kilowatts?
Multiply the value in horsepower (mechanical) by 0.7456998716: kilowatts = horsepower (mechanical) × 0.7456998716. For example, 5 hp = 3.7285 kW.
How do I convert kilowatts back to horsepower (mechanical)?
Multiply by the inverse factor 1.34102209 (horsepower (mechanical) = kilowatts × 1.34102209), or use the kilowatts-to-horsepower (mechanical) page.
Related conversions
- Kilowatts to horsepower (mechanical) (reverse)
- Power Converter — all power units in one tool
- Kilowatts to Watts
- Watts to Kilowatts
- BTU per hour to Watts
- Watts to BTU per hour
- Metric horsepower (PS) to Kilowatts
- Kilowatts to Metric horsepower (PS)
- Tons of refrigeration to Kilowatts
- Kilowatts to Tons of refrigeration
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=hp&to_unit=kW - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"hp","to_unit":"kW"} - Markdown: https://tttkmbb.com/conversion/hp-to-kw.md · JSON: https://tttkmbb.com/conversion/hp-to-kw.json (add
?value=for a result) · Units: /api/v1/units?quantity=power - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.