Engine Horsepower Calculator CalculatorScale.com
Automotive & Drag Strip1/4 Mile ET & Trap Speed

Engine Horsepower Calculator

Estimate peak engine horsepower of any vehicle based on total vehicle weight, quarter-mile (402.3m) elapsed time (ET), or trap speed across the finish line.

Enter vehicle total weight and quarter-mile time or speed to calculate HP
seconds
Estimated Peak Engine Power

281.16 HP — 209.66 kW

Formula: Horsepower = Weight / (ET / 5.825)³
Crank Horsepower (BHP)
281.16 HP
Flywheel / Gross HP
Estimated Wheel HP (WHP)
239.0 WHP
~15% Drivetrain Loss (FWD/RWD)
Power-to-Weight Ratio
12.4 lbs/hp
80.3 hp / ton
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