Horsepower to Watts Converter
Enter a value to instantly convert between power units.
Precision4 dp
1 Horsepower (mech) = 745.6999 Watt
Key Formulas
Kilowatt → Horsepower (mech)
hp = kW × 1.34102Horsepower (mech) → Kilowatt
kW = hp × 0.7457Watt → Kilowatt
kW = W × 0.001Kilowatt → Watt
W = kW × 1000Formula
W = hp × 745.7One mechanical horsepower equals 745.7 watts. This unit was defined by James Watt to rate steam engines — the power of one horse doing work. Now used for engines, motors, and mechanical equipment.
Source: NIST SP 811
Frequently Asked Questions
Real-World Examples
1 hp equals 745.7 watts — one horse's power.
1 hp = 745.7 W
10 hp equals 7457 W — small car engine.
10 hp = 7457 W
100 hp equals 74,570 W — large vehicle.
100 hp = 74570 W
0.5 hp equals 372.85 W.
0.5 hp = 372.85 W