Estimate quarter-mile elapsed time and trap speed from power.
Quarter-mile performance follows a rough cube-root rule in the weight to power ratio, producing elapsed time and an estimated trap speed. These approximations assume good traction and perfect launching, so they are ballpark figures rather than guarantees of real drag-strip performance.
Quarter Mile Time
ET ~ 6.269 x (weight / hp)^(1/3); trap ~ 234 x (hp / weight)^(1/3)
Estimates assume favorable traction and shifting; real results depend on tires, drivetrain losses and weather.
ET ~ 6.269 x (weight / hp)^(1/3); trap ~ 234 x (hp / weight)^(1/3) Quarter-mile performance follows a rough cube-root rule in the weight to power ratio, producing elapsed time and an estimated trap speed.
These approximations assume good traction and perfect launching, so they are ballpark figures rather than guarantees of real drag-strip performance.
This calculator takes 2 inputs: Vehicle weight, Horsepower. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.