kW to HP Converter (Automotive)

Car power ratings in Europe and Asia are often listed in kilowatts (kW), while horsepower (HP) remains the familiar unit for most buyers — the kW to HP Converter bridges that gap instantly. Enter your engine's kilowatts, then select your horsepower type — Metric HP (PS) used in European specs or Mechanical HP (bhp) common in UK and US markets — to get the converted horsepower value. Secondary outputs include the conversion factor applied and a power category for your engine.

kW

Enter engine power in kilowatts

Select horsepower standard

Results

Horsepower

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Conversion Factor

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Power Category

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Results Table

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Frequently Asked Questions

What is the difference between kilowatts and horsepower?

Kilowatts (kW) is the metric unit of power in the International System of Units, while horsepower (HP) is an imperial unit. Both measure the rate of energy transfer, with 1 kW equal to approximately 1.341 mechanical horsepower.

How do you convert kW to HP for automotive engines?

To convert kilowatts to horsepower, multiply the kW value by 1.341 for mechanical HP or by 1.360 for metric HP (PS). The formula is: HP = kW × conversion factor.

What's the difference between metric HP and mechanical HP?

Metric horsepower (PS) is based on the metric system and equals 735.5 watts, while mechanical horsepower (bhp) equals 745.7 watts. Metric HP is commonly used in Europe, while mechanical HP is used in the US.

Why do car manufacturers use both kW and HP ratings?

Different regions prefer different units. European markets often use kW and metric HP (PS), while American markets use mechanical HP (bhp). Manufacturers provide both to meet regional preferences and regulations.

How accurate is kW to HP conversion for engine power?

The conversion is mathematically precise as both units measure power. However, actual engine output may vary due to testing conditions, measurement standards, and whether it's measured at the flywheel or wheels.

What kW range is typical for automotive engines?

Small economy cars typically range from 50-100 kW, mid-size vehicles from 100-200 kW, performance cars from 200-400 kW, and supercars can exceed 600 kW. Electric vehicles often have similar ranges.