HP to kW Converter (Horsepower to Kilowatts)
PrintHorsepower to Kilowatt Conversion Table
| Horsepower (hp) | Kilowatt (kW) |
|---|---|
| 1 hp | 0.7456999 kW |
| 5 hp | 3.7284994 kW |
| 10 hp | 7.4569987 kW |
| 20 hp | 14.913997 kW |
| 50 hp | 37.284994 kW |
| 100 hp | 74.569987 kW |
| 150 hp | 111.85498 kW |
| 200 hp | 149.13997 kW |
| 500 hp | 372.84994 kW |
Horsepower (hp) and kilowatts (kW) are the two primary units used internationally to specify the power output of internal combustion engines, electric vehicle (EV) drive motors, marine engines, and industrial electrical machinery. While the kilowatt (kW) is the official International System of Units (SI) standard, horsepower (hp / PS / bhp) remains the most widely recognized commercial figure in the automotive industry.
Our free online Hp to Kw Converter provides high-precision calculations in both directions:
- Mechanical Horsepower (hp / SAE) to Kilowatts: Multiply hp by
0.74569987(or divide by1.341022). - Metric Horsepower (PS / DIN / CV) to Kilowatts: Multiply PS by
0.73549875(or divide by1.359622). - Electrical Horsepower to Kilowatts: Multiply hp(E) by
0.74600000. - Kilowatts to Horsepower: Multiply kW by
1.34102209.
How to Convert Horsepower to Kilowatts (HP to kW Formula)
Because different global regions define horsepower based on either imperial foot-pounds or metric kilogram-meters, use the corresponding formula below:
| Horsepower Standard | Conversion Multiplier | Exact Formula | 100 HP Output |
|---|---|---|---|
| Mechanical / Imperial (SAE / bhp) | × 0.74569987 |
kW = hp × 0.7457 |
74.57 kW |
| Metric (European DIN / PS / CV) | × 0.73549875 |
kW = PS × 0.7355 |
73.55 kW |
| Electric Motor Horsepower | × 0.74600000 |
kW = hp(E) × 0.7460 |
74.60 kW |
| Boiler Horsepower | × 9.80950000 |
kW = hp(S) × 9.8095 |
980.95 kW |
Step-by-Step Calculation Examples
Example 1: Convert 150 Mechanical Horsepower to Kilowatts (Midsize Sedan)
| Step | Execution Logic | Calculated Value |
|---|---|---|
| Step 1: Input HP | Identify engine mechanical horsepower | 150 hp |
| Step 2: Multiplier | Select mechanical factor (0.74569987) | 150 × 0.74569987 |
| Step 3: Final Answer | Multiply and round to 2 decimal places | 111.85 kW |
Example 2: Convert 300 Metric Horsepower (PS) to Kilowatts (Sports Car)
| Step | Execution Logic | Calculated Value |
|---|---|---|
| Step 1: Input PS | Identify European DIN horsepower rating | 300 PS |
| Step 2: Multiplier | Select metric factor (0.73549875) | 300 × 0.73549875 |
| Step 3: Final Answer | Multiply and round to 2 decimal places | 220.65 kW |
Horsepower to Kilowatts Conversion Table
Below is a reference conversion table covering vehicle horsepower ratings from 1 hp up to 1,000 hp:
| Horsepower (hp / SAE) | Power in Kilowatts (kW) | Metric HP (PS) Equivalent | Automotive & Machinery Benchmark |
|---|---|---|---|
| 1 hp | 0.7457 kW | 1.0139 PS | 745.7 Watts (Exact mechanical definition) |
| 5 hp | 3.7285 kW | 5.0693 PS | Small commercial air compressor / lawn tractor |
| 10 hp | 7.4570 kW | 10.1387 PS | Light motorcycle engine / heavy workshop pump |
| 25 hp | 18.6425 kW | 25.3467 PS | Compact farm tractor / commercial marine outboard |
| 50 hp | 37.2850 kW | 50.6935 PS | Agricultural machinery / micro-car engine |
| 75 hp | 55.9275 kW | 76.0402 PS | Standard compact hatchback vehicle engine |
| 100 hp | 74.5700 kW | 101.3870 PS | 100 HP Sedan benchmark (74.57 kW) |
| 150 hp | 111.8550 kW | 152.0805 PS | Turbocharged passenger sedan / compact SUV |
| 200 hp | 149.1399 kW | 202.7739 PS | Midsize crossover / standard electric SUV motor |
| 250 hp | 186.4250 kW | 253.4674 PS | Sport luxury sedan / heavy-duty pickup truck |
| 300 hp | 223.7099 kW | 304.1609 PS | 300 HP Performance sports car benchmark |
| 400 hp | 298.2799 kW | 405.5479 PS | Dual-motor performance EV / V8 muscle car |
| 500 hp | 372.8499 kW | 506.9348 PS | 500 HP Supercar benchmark / heavy construction rig |
| 700 hp | 521.9899 kW | 709.7088 PS | High-end exotic supercar / track racecar |
| 1,000 hp | 745.6999 kW | 1,013.8697 PS | 1,000 HP Hypercar benchmark (≈ 0.75 Megawatt) |
Related Power and Engine Calculators
Need to convert kilowatts back to horsepower or calculate engine torque? Explore our connected tools:
- kW to HP Converter — Convert Kilowatts to Mechanical and Metric Horsepower.
- Engine Horsepower Calculator — Calculate flywheel brake horsepower from torque and engine RPM.
- Electricity Calculator — Compute power consumption and energy costs in kWh.
- Conversion Calculator — Universal conversion engine across 30+ physical units.
Frequently Asked Questions (FAQ)
How many kW is 1 horsepower?
1 mechanical horsepower (hp / SAE) equals 0.74569987 kilowatts (approximately 745.7 Watts). 1 metric horsepower (PS) equals 0.73549875 kilowatts.
How do you convert 200 HP to kW?
Multiply 200 by 0.7457: 200 × 0.74569987 = 149.14 kW (mechanical hp). If using metric PS: 200 × 0.73549875 = 147.10 kW.
What is the difference between HP, BHP, and kW?
HP (Horsepower) is the imperial unit of power. BHP (Brake Horsepower) is the engine’s raw power output measured at the crankshaft before gearbox and accessory friction losses. kW (Kilowatt) is the SI metric standard measuring energy transfer rate at 1,000 Joules per second.