134.1022
hp
135.9622
hp
100,000
W
134.1022
hp
135.9622
hp
100,000
W
The Kilowatts to Horsepower Converter converts power from kilowatts (kW) to mechanical horsepower (HP) using the conversion factor 1 kW = 1.34102 HP. This conversion is essential for comparing electric vehicle specifications, sizing motors, and translating between SI and traditional power ratings.
Kilowatts and horsepower are the two most commonly used units for expressing engine and motor power output. In the European Union, vehicle power must be stated in kW (per EU Directive 80/181/EEC), while in the United States and United Kingdom, horsepower is the conventional standard. Most international automotive publications quote both values to serve all markets.
The conversion factor 1.34102 HP/kW comes from the definition of mechanical horsepower: 1 HP = 745.7 W = 0.7457 kW. Taking the reciprocal gives 1 kW = 1/0.7457 = 1.34102 HP. A convenient mental shortcut is to multiply kW by 4/3, which gives a result within 0.6% accuracy.
This converter is particularly relevant in the age of electric vehicles. EV manufacturers typically specify motor output in kW, but consumers in the US think in horsepower. A Tesla Model 3 Long Range, for example, produces about 258 kW, which consumers understand better as 346 HP. Similarly, industrial electric motors are increasingly rated in kW but must be compared with HP-rated legacy equipment.
Our converter also provides the input value in watts for precision applications. Whether you are comparing vehicles across markets, selecting a replacement motor, or performing power system analysis, this tool provides instant, accurate conversions.
The formula: HP = kW × 1.34102 (or equivalently, kW ÷ 0.7457). For watts: W = kW × 1000. The factor 1.34102 is the reciprocal of 0.74570 (1 HP in kW).
Vehicle reference: economy cars 60–100 kW (80–134 HP), mid-size 110–180 kW (148–241 HP), sports cars 250–500 kW (335–670 HP), supercars 500+ kW (670+ HP), Formula 1 ≈ 700 kW (940 HP).
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Results
Tesla Model 3 LR: 258 kW ≈ 346 HP
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Results
37 kW motor ≈ 50 HP
Multiply kilowatts by 1.34102. For example, 75 kW × 1.34102 = 100.58 HP.
Yes, approximately. 1 kW = 1.34102 mechanical HP. The exact value depends on which horsepower definition is used.
Multiply kW by 4/3 (1.333). This gives results within 0.6% of the exact value. For example, 75 kW × 4/3 = 100 HP (exact: 100.58 HP).
100 HP = 74.57 kW. Conversely, 100 kW = 134.1 HP.
EU Directive 80/181/EEC mandates SI units (kW) for vehicle specifications. The US has no such requirement, so the traditional HP convention persists.
1 kW = 1.35962 PS (metric HP). This is slightly different from mechanical HP: 1 kW = 1.34102 mech HP. The metric HP is about 1.4% smaller.
A 10 HP motor = 7.457 kW. The standard metric motor size would be 7.5 kW, providing slightly more than 10 HP.
Common NEMA HP sizes and kW equivalents: 1 HP=0.75 kW, 5 HP=3.7 kW, 10 HP=7.5 kW, 25 HP=18.5 kW, 50 HP=37 kW, 100 HP=75 kW.
Multiply kW by 3412.14. For example, 10 kW = 34,121.4 BTU/hr.
Modern F1 power units produce about 700 kW (940 HP) total, combining a 1.6L turbo V6 engine with hybrid energy recovery systems.
Roboculator Team
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