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Quarter Mile Calculator
Estimate quarter-mile elapsed time and trap speed from your vehicle’s weight and horsepower.
lbs
hp
How the Quarter Mile Calculator Works
This tool estimates elapsed time (ET) and trap speed for a standing-start quarter mile using the widely used empirical drag-racing formulas: ET = 5.825 × (weight ÷ horsepower)1/3 seconds, and trap speed = 234 × (horsepower ÷ weight)1/3 mph.
These formulas assume a well-driven, properly geared vehicle with good traction. Real-world results vary with tire grip, gearing, driver skill, altitude, and aerodynamics, so treat the output as a ballpark estimate for general planning purposes rather than a guarantee.
Last reviewed August 2026