The watt is the SI unit of power.
Watts to Mechanical Horsepower
Convert watt (W) to mechanical horsepower (hp) instantly.
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Mechanical horsepower is a traditional unit of power.
hp = W × 0.00134102208884
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Formula
hp = W × 0.0013410221
W = hp × 745.6998715822702
Conversion table
| 1 W | 0.001341 hp |
| 5 W | 0.006705 hp |
| 10 W | 0.013410 hp |
| 20 W | 0.026820 hp |
| 50 W | 0.067051 hp |
| 100 W | 0.134102 hp |
| 500 W | 0.670511 hp |
| 1000 W | 1.341022 hp |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the watt (W), the SI unit of power, equal to one joule per second.
What is the destination unit in this conversion?
The destination unit is mechanical horsepower (hp), a traditional imperial unit of power used for engines and motors.
How do I convert watts to mechanical horsepower?
Multiply the watt value by 0.0013410221 to get mechanical horsepower. For example, 1000 W × 0.0013410221 = 1.341022 hp.
Is the watts to mechanical horsepower conversion exact?
Yes. One mechanical horsepower is defined as exactly 745.6998715822702 watts, so the conversion factor is exact.
Where is this conversion commonly used?
It's used for rating car, motorcycle, and small-engine power output, and for comparing electric motor wattage to traditional engine horsepower ratings.
Can I convert mechanical horsepower back to watts?
Yes. Multiply the horsepower value by 745.6998715822702 to get watts.
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About this conversion
This page converts watts (W), the SI unit of power, into mechanical horsepower (hp), the traditional imperial unit used for rating engines and motors.
This conversion is used whenever electric motor power, given in watts, needs to be compared with combustion engine power, traditionally rated in horsepower, such as for vehicles, generators, and machinery.
The formula is hp = W × 0.0013410221, based on the fixed definition of one mechanical horsepower as 745.6998715822702 watts.
The conversion is exact, since mechanical horsepower is defined by a fixed numeric relationship to the watt.
The watt is the SI-derived unit of power, while mechanical horsepower is a legacy imperial unit still widely used in the automotive and machinery industries.