Mechanical horsepower to watts converter
Convert mechanical horsepower to watts with an editable calculator, worked example, formula and reference table. Check the unit definitions before you convert.
Updated · How we checkUse a decimal point, such as 2.5. Enter a value in hp; the result is in W.
Formula
Worked example
Convert 100 hp to W:
100 hp ≈ 74,569.98716 W
Multiply your hp value by the factor above. The calculator uses the full conversion factor before rounding the displayed answer.
Mechanical horsepower to watts table
Reference values rounded to 10 significant digits. Use the converter above for other amounts.
| Mechanical horsepower (hp) | Watts (W) |
|---|---|
| 0.1 | ≈ 74.56998716 |
| 0.5 | ≈ 372.8499358 |
| 1 | ≈ 745.6998716 |
| 2 | ≈ 1,491.399743 |
| 5 | ≈ 3,728.499358 |
| 10 | ≈ 7,456.998716 |
| 25 | ≈ 18,642.49679 |
| 50 | ≈ 37,284.99358 |
| 100 | ≈ 74,569.98716 |
| 1000 | ≈ 745,699.8716 |
Understanding mechanical horsepower
Mechanical horsepower here is 550 international foot-pounds-force per second. It differs from metric horsepower, electrical horsepower and boiler horsepower.
Understanding watts
A watt is one joule per second: a rate of energy transfer. Watts measure power; watt-hours measure energy accumulated over time.
Precision and rounding
The calculator keeps decimal precision during the conversion. Displayed values use up to 10 significant digits; an approximation sign marks the reference results. Keep extra digits until your final measurement or purchase decision.
References
Definitions and method references. Example rates and prices on this page are editable assumptions.