⚡

Horsepower to Kilowatts Converter — Engine Dyno Testing & Marine Motors

Convert horsepower to kilowatts (HP to kW) instantly. Calculate engine dyno test results, marine outboard motors, and international vehicle registration kW.

✨
kW
HP
Mechanical Ratio

1 HP ≅ 0.7457 kW | 1 kW ≅ 1.3410 HP

1000Watts (W)
3412.14BTU per Hour
0.2843Refrigeration Ton

Did You Know?

Origins

The term "Horsepower" was adopted in the late 18th century by James Watt to compare the output of steam engines with the power of draft horses.

Modern EV Scaling

Electric vehicles like the Tesla Model S are often rated in kW globally, translating to as much as 760+ HP for performance models.

Power Conversion Tables

Kilowatts (kW)Horsepower (HP)
1 kW1.341 HP
10 kW13.410 HP
50 kW67.051 HP
100 kW134.102 HP
150 kW201.153 HP
200 kW268.204 HP
500 kW670.511 HP
1000 kW1,341.022 HP
Horsepower (HP)Kilowatts (kW)
1 HP0.7457 kW
5 HP3.7285 kW
10 HP7.4570 kW
50 HP37.2850 kW
100 HP74.5700 kW
200 HP149.1400 kW
500 HP372.8500 kW
1000 HP745.7000 kW

Overview & Capabilities

Converting horsepower (HP) to kilowatts (kW) translates traditional combustion engine power and dynamometer test curves into standard international metric units. In Europe, Australia, and international vehicle registration systems, automobile road taxes and boat licensing are regulated strictly in kilowatts. Multiplying mechanical horsepower by 0.7457 (or dividing by 1.341) provides exact kilowatts.

Tutorial

How to Use

01
Enter the engine power in Horsepower (HP).
02
The engine multiplies by 0.7457 to compute exact Kilowatts (kW).
03
Check automotive and marine benchmarks (150 HP outboard, 300 HP V6 car, 500 HP sports coupe).
04
Use the kilowatt figure for vehicle importation or marine registration paperwork.
Capabilities

Key Features

Standard mechanical horsepower to kilowatt multiplier (1 HP = 0.7456999 kW)
Automotive & Marine Presets: 15 HP (11.2 kW dinghy), 150 HP (111.9 kW outboard), 300 HP (223.7 kW sedan), 450 HP (335.6 kW V8)
Dynamometer power curve conversion table
Zero server latency
Applications

Common Use Cases

International Car Registration: Convert a 350 HP American muscle car into 261 kW for European vehicle registration.
Marine Boat Licensing: Translate a 115 HP outboard motor into 85.8 kW for waterway permits.
Dyno Tuning Analysis: Convert brake horsepower (BHP) wheel runs into SI metric electrical equivalents.
Guidance

Tips & Best Practices

💡
Quick mental estimate: Multiply horsepower by 0.75 (e.g. 200 HP × 0.75 = 150 kW, exact is 149.1 kW).
💡
1 mechanical horsepower is exactly 745.699872 Watts.
Ecosystem

Related Tools

Kilowatts to Horsepower Converter

Kilowatts to Horsepower Converter

Convert kilowatts to horsepower (kW to HP) instantly. Calculate electric vehicle (EV) motor outputs, industrial pump ratings, and generator capacity.

Horsepower to CC Converter

Horsepower to CC Converter

Convert horsepower (HP) to cubic centimeters (cc) engine displacement. Calculate engine sizing for riding lawn mowers, portable generators, and pressure washers.

Power Converter

Power Converter

Universal power converter for Watts (W), Kilowatts (kW), Horsepower (HP), BTU/hr, and Tons of Refrigeration. Calculate HVAC AC cooling loads and electrical capacity.

Degrees to Radians Converter

Degrees to Radians Converter

Convert degrees to radians (deg to rad) instantly with exact π notation. Calculate angles for JavaScript Math functions, robotic arm servos, and navigation.

Answers

Frequently Asked Questions

Q What is 300 HP in kilowatts?

300 HP equals 223.71 kW.

Q What is 150 HP in kW?

150 HP equals 111.86 kW.

Q What is 200 HP in kilowatts?

200 HP equals 149.14 kW.

Q What is 500 HP in kW?

500 HP equals 372.85 kW.