Horsepower to Watts Converter

Power Converter

Horsepower hp

⇄

Watts W

0.1 hp / 75 W 1 hp / 746 W 10 hp / 7.5 kW 100 hp / 75 kW 500+ hp / 373+ kW

⚡

Enter a power value to see the conversion and context

Common power levels:

Common Power References

USB Charger 0.007 hp = 5 W

Incandescent Bulb 0.08 hp = 60 W

Desktop PC 0.4 hp = 300 W

Microwave 1.3 hp = 1000 W

Hair Dryer 2 hp = 1500 W

Electric Kettle 2.4 hp = 1800 W

Electric Bike 1 hp = 750 W

Tesla Model 3 283 hp = 211 kW

W = hp × 745.7

Horsepower to Watts

hp = W ÷ 745.7

Watts to Horsepower

Understanding Horsepower

Horsepower (hp) is a unit of power originally defined by James Watt to compare the output of steam engines with the power of draft horses. There are actually several definitions of horsepower used today.

🔧 Mechanical Horsepower

The most common type, used for engines and motors in the US and UK.

1 hp = 745.699872 W

🇪🇺 Metric Horsepower (PS)

Used in Europe and Asia. "PS" stands for Pferdestärke (German for horsepower).

1 PS = 735.49875 W

⚡ Electrical Horsepower

Used for electric motors, exactly defined.

1 hp(E) = 746 W exactly

🌡️ Boiler Horsepower

Used for steam boilers, much larger than mechanical hp.

1 hp(S) = 9,810.55 W

This converter uses mechanical horsepower (745.699872 W), which is the most common type you'll encounter for car engines, power tools, and industrial equipment.

Watts (W) is the SI unit of power, named after James Watt. One watt equals one joule of energy per second. For larger values, kilowatts (kW) are often used — 1 kW = 1000 W.

Fun fact: The average human can sustain about 75 watts (0.1 hp) of power output, while a trained cyclist can briefly produce over 2000 watts (2.7 hp) during a sprint!

Privacy & Limitations

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Results are estimates and may vary based on actual conditions.

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