Milliwatts to Horsepower Converter
Enter a value to instantly convert between power units.
1 Milliwatt = 0 Horsepower (mech)
Key Formulas
Kilowatt → Horsepower (mech)
hp = kW × 1.34102Horsepower (mech) → Kilowatt
kW = hp × 0.7457Watt → Kilowatt
kW = W × 0.001Kilowatt → Watt
W = kW × 1000Formula
hp = mW ÷ 745,699.87Tiny fractional-horsepower motors in medical devices, precision instruments, and miniature robotics are sometimes rated in millihorsepower, but the surrounding electronics are specified in milliwatts. Converting between the two lets engineers compare motor power to sensor and controller budgets on the same scale. A 500 mW brushless DC motor is about 0.00067 hp — a fractional motor by any measure.
Source: NIST SP 811, Table B.8
Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
745.7 mW = 0.001 hp (1 millihorsepower) — a tiny motor standard for micro-pumps and precision lab equipment.
745.7 mW = 0.001 hp
A 5,000 mW (5 W) gearbox motor = 0.0067 hp — common in small robots, conveyor drives, and 3D printer extruder motors.
5000 mW = 0.0067 hp
A 100,000 mW (100 W) brushless motor = 0.134 hp — used in electric bicycles, drones, and hobbyist CNC machines.
100000 mW = 0.134 hp
A 373,000 mW (373 W) motor = 0.5 hp — a standard fractional-horsepower rating for small fans and pumps.
373000 mW = 0.5 hp