Convert watts to hp

Watt

A watt is the SI unit of power equal to one joule per second.

The watt became the standard power unit for electrical and mechanical calculations.

W is used for electronics, appliances, motors, electrical loads, power supplies, and engineering calculations.

Horsepower (mechanical)

Mechanical horsepower is a power unit equal to 745.6998715823 watts.

Horsepower originated as a way to compare engine output with the work rate of draft horses and remains common in machinery ratings.

hp is used for engines, electric motors, pumps, compressors, fans, vehicles, and mechanical equipment specifications.

How to Convert Watt to Horsepower (mechanical)

Mathematically, horsepower (mechanical) (hp) = watt (W) converted with the formula below.

1 W = 0.001341 hp

1 hp = 745.699872 W

Formula: value × 0.00134102208959

Example: 15 W = 0.020115 hp

1. Start with the power value in watts.
2. Use 1 mechanical horsepower = 745.6998715823 W.
3. Divide the watt value by 745.6998715823.
4. Report the converted result in horsepower.

Precision note: This converter uses mechanical horsepower: 1 hp = 745.6998715823 W. Other horsepower definitions can differ slightly.

How many W in hp and hp in W

1 W = 0.001341 hp

1 hp = 745.699872 W

Common Use Cases for W to hp

• Comparing electric motor output with horsepower ratings.
• Translating machinery power from watts into a familiar mechanical unit.
• Checking pump, fan, compressor, or engine specifications.
• Preparing explanations for readers who expect horsepower instead of watts.

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