Horsepower to Watts

Convert mechanical horsepower to watts with precision — multiply by 745.7. Essential for comparing engine power ratings with electrical motor and generator specs.

1 hp × 745.7 = 745.7 W

Result in W

745.7 W

hp1↓× 745.7W745.7

About this calculator

Horsepower (hp) is a traditional power unit, while watts (W) are the SI standard. One mechanical horsepower equals exactly 745.7 watts. This conversion is useful when comparing engine power ratings with electrical motor specs. A 100 hp engine produces about 74,570 watts.

Common examples

  • 1 hp = 745.7 W
  • 5 hp = 3,728.5 W
  • 10 hp = 7,457 W
  • 50 hp = 37,285 W
  • 100 hp = 74,570 W