Mechanical Horsepower to Watts Calculator
Enter mechanical horsepower to find watts. W = hp × 745.699871582.
How the result changes
Only mechanical horsepower changes; all other inputs stay at your current values. The line illustrates the formula across the shown range. This is not a forecast of real-world outcomes.
About this calculation
Convert mechanical horsepower (hp) to watts (W) while preserving the underlying power quantity. The calculator updates when the input changes and shows the conversion rule and a worked example.
Formula
W = hp × 745.699871582
Worked example
With Mechanical Horsepower: 1 hp, watts is 745.699872 W.
How to convert mechanical horsepower to watts
Enter a value in mechanical horsepower. Multiply it by the factor in the displayed formula to express the same quantity in watts. To reverse the relationship, divide by the same nonzero factor.
W = hp × 745.699871582. As a reference point, 10 hp equals 7,456.998716 W with this conversion. This is an example, not a recommended level or target.
What the unit relationship means
Mechanical Horsepower and watts measure power: the rate at which energy is transferred or work is done. A larger rating can mean more work in the same time under comparable conditions, but a converted rating is still the same power. To estimate energy use, combine power with operating time and use an energy unit such as watt-hours. A hp-to-W result should never be mistaken for a total electricity bill or energy consumption by itself.
Check the direction of the result
As a scale check, one hp corresponds to 745.699872 W. Doubling the input from 10 hp to 20 hp changes the calculated output from 7,456.998716 W to 14,913.997432 W. Ordinary factor conversions are proportional: zero maps to zero and doubling the input doubles the result. If a copied value does not follow this pattern, check the source unit, decimal point, and formula direction.
When this conversion is useful
Compare equipment or motor power ratings expressed in mechanical horsepower and watts. Power describes the rate at which energy is transferred.
What to check
This calculator uses mechanical horsepower. Metric horsepower (PS) has a different definition; check which horsepower unit a specification uses. In this direction the entered mechanical horsepower is reported as watts; check both unit symbols when copying a figure from another source, because the reverse direction answers a different question.
Precision and reporting
A rated power is often a nominal or maximum operating figure. Converting it accurately does not guarantee that equipment draws or delivers that power continuously. For comparisons, use consistent rating conditions and round the final result to reflect the source specification. For a separate reporting example, 7.3 hp produces 5,443.609063 W. If 7.3 hp was an approximate reading, the converted digits should not be treated as a more accurate measurement.
Common questions
What is the reverse of mechanical horsepower to watts?
To return from W to hp, divide by the nonzero factor shown in this calculator's formula.
Inputs
- Mechanical Horsepower (hp)