Input
Results
kW
1
hp (mechanical)
1.341
| Quantity | Value |
|---|---|
| kW | 1 |
| hp (mechanical) | 1.341 |
| hp (metric PS) | 1.36 |
| hp (electrical) | 1.34 |
| hp (boiler) | 0.102 |
Formulas
Core definitions:
- 1 hpmechanical = 0.745699871582 kW
- 1 hpmetric = 0.73549875 kW
- 1 hpelectrical = 0.746 kW
- 1 hpboiler = 9.8095 kW
Conversions:
kW → hp (chosen standard): hp = kW / kW_per_hp
hp → kW (chosen standard): kW = hp × kW_per_hp
Note: Standards differ slightly by definition, so values vary by context such as automotive, electrical, or steam boiler ratings.
Examples
- 100 kW to hp (mechanical): 100 ÷ 0.74569987158227 ≈ 134.102 hp
- 250 hp (metric) to kW: 250 × 0.73549875 = 183.875 kW
Use the permalink to share your specific setup and results.
Unit notes
- Mechanical hp: common for engine output in many countries.
- Metric hp (PS): used historically in Europe and Asia for vehicle power.
- Electrical hp: based on exactly 746 W per hp.
- Boiler hp: steam-generation rating; not comparable to engine hp.
FAQs
Mechanical horsepower is defined as 745.699871582 W per hp while metric horsepower PS is 735.49875 W per hp. The two are close but not identical.
hp = kW ÷ kW per hp for the chosen standard. For example with mechanical horsepower hp = kW ÷ 0.745699871582.
Yes. Use kW = hp × kW per hp for the selected standard. Set the quantity to "hp → kW" and choose the appropriate standard.
Different fields historically defined horsepower using slightly different watt equivalents. The calculator shows all standards so you can pick the correct one for your application.
Use enough precision to meet your spec or reporting rules. Engineering summaries often use 2–3 decimals while technical analysis may use 4–6 decimals or significant figures.
No. Boiler horsepower is a steam-generation measure used for boiler output. Use mechanical or metric horsepower for engines and motors and electrical horsepower for electrical machinery.
Yes. Use the Copy button to place the full table on your clipboard and use the Permalink to share a link with all inputs and rounding settings.