Horsepower Calculator
Estimate Wheel Horsepower (WHP) and Crank HP from 1/4 mile performance.
Include driver weight.
Formulas
These formulas provide an approximation of horsepower based on drag strip performance.
Based on ET
HP = Weight / (ET / 5.825)³
Based on Trap Speed
HP = Weight * (Speed / 234)³
Wheel vs Crank HP
These results generally estimate Wheel Horsepower (power at the wheels). Crank horsepower (advertised by manufacturers) is typically 15-20% higher due to drivetrain loss.