Science & Engineering
Horsepower and Mechanical Power Calculator
Calculate mechanical power from force and speed, then convert watts to mechanical horsepower and kilowatts. The calculator uses power = force × velocity; mechanical horsepower = watts ÷ 745.699872. It returns more than one result so you can check the main answer against a useful secondary measure. Power describes the rate of doing work, not total work completed. Drivetrain losses, rotating systems, duty cycle, and peak versus continuous ratings need separate treatment.
Educational model only. Use applicable standards, calibrated measurements, and qualified review for safety-critical work.
Calculate and compare
Use the number box for precision or the slider for fast scenario testing.
Scenario results
Mechanical output power
9.6 kW
Force × velocity.
Output horsepower
12.8738 hp
Mechanical horsepower conversion.
Required input power
11.2941 kW
After entered efficiency.
How the calculation works
Use consistent units and retain full precision until the final display step.
Worked example
Reproduce the displayed scenario, then change one assumption at a time.
Assumptions behind the result
- • Inputs use the units shown beside each control.
- • The displayed formula is applied without hidden market or demographic data.
- • Rounding occurs only for display; calculations keep full numeric precision.
- • Power describes the rate of doing work, not total work completed.
- • Drivetrain losses, rotating systems, duty cycle, and peak versus continuous ratings need separate treatment.
Mistakes that change the answer
- • Mixing percentages with decimals or mixing incompatible units.
- • Relying on a rounded intermediate value instead of the full result.
- • Changing several assumptions at once instead of testing force separately.