Engine Horsepower Calculator

Convert Ounce To Gram Kilowatts To Amps Calculator Convert Kilowatt Hour To Watt Hour Convert Meganewton To Kilogram Force

Understanding Engine Horsepower

What is Horsepower?

Horsepower (HP) is a unit of measurement that quantifies the power output of an engine. One horsepower equals 33,000 foot-pounds of work per minute, a standard established by engineer James Watt in the late 18th century.

Calculation Methods

This calculator offers three methods to estimate engine horsepower:

  • Elapsed Time Method: Uses quarter-mile time and vehicle weight
  • Trap Speed Method: Uses quarter-mile speed and vehicle weight
  • RPM & Torque Method: Uses engine RPM and torque measurements