Horsepower

Horsepower (hp)

The horsepower is an iconic imperial unit for measuring power, defined historically as the power output of a draft horse. It remains standard for car engines in the US and automotive industry worldwide.

Characteristics

• Imperial system unit
• 1 hp = 745.7 watts (mechanical horsepower)
• Car engines: rated in horsepower (typical: 100-400 hp)
• Motor ratings: expressed in hp for industrial motors
• Variants: mechanical hp, electrical hp, boiler hp

Conversions

• 1 hp = 745.7 W
• 1 hp = 0.7457 kW
• 1 hp = 0.000747 MW
• 1 hp = 0.9863 BTU/s
• 1 hp = 3540 BTU/h
• 1.34102 hp = 1 kW