Quarter-Mile Calculator
Quarter-Mile is evaluated from Horsepower and Vehicle Weight. The calculation reports Estimated Quarter-Mile ET, Estimated Trap Speed and Estimated 0 - 60 MPH.
Results
About the Quarter-Mile Calculator
The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.
Formula basis:
ET (sec) = 6.269 x (weight_lbs / HP)^(1/3)
Trap speed (mph) = 234 x (HP / weight_lbs)^(1/3)
0 - 60 estimate = ET x 0.60 (rough approximation)
Power-to-weight (HP/ton) = HP / (weight_lbs / 2000)
The cube root relationship means diminishing returns: doubling HP does not halve the ET - it only reduces it by ~21%.
Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.
Formula & How It Works
The calculation applies the following relations exactly as recorded in the metadata: ET (sec) = 6.269 x (weight_lbs / HP)^(1/3) Trap speed (mph) = 234 x (HP / weight_lbs)^(1/3) 0 - 60 estimate = ET x 0.60 (rough approximation) Power-to-weight (HP/ton) = HP / (weight_lbs / 2000) The cube root relationship means diminishing returns: doubling HP does not halve the ET - it only reduces it by ~21%. Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.
Worked Examples
Example 1: Dodge Challenger Hellcat: 717 HP, 4,500 lbs
Inputs
With Horsepower = 717 and Vehicle Weight = 4,500 as the stated inputs, the result is Estimated Quarter-Mile ET = 11.56 sec, Estimated Trap Speed = 126.9 mph and Estimated 0 - 60 MPH = 6.94 sec. Each value corresponds to the declared output fields.
Example 2: Honda Civic Type R (2024): 315 HP, 3,117 lbs
Inputs
With Horsepower = 315 and Vehicle Weight = 3,117 as the stated inputs, the result is Estimated Quarter-Mile ET = 13.46 sec, Estimated Trap Speed = 109 mph and Estimated 0 - 60 MPH = 8.08 sec. Each value corresponds to the declared output fields.
Example 3: Ford F-150 XLT 3.5L EcoBoost V6: 400 HP, 4,800 lbs
Inputs
With Horsepower = 400 and Vehicle Weight = 4,800 as the stated inputs, the result is Estimated Quarter-Mile ET = 14.35 sec, Estimated Trap Speed = 102.2 mph and Estimated 0 - 60 MPH = 8.61 sec. Each value corresponds to the declared output fields.
Example 4: Tesla Model 3 Performance: 456 HP, 4,065 lbs
Inputs
With Horsepower = 456 and Vehicle Weight = 4,065 as the stated inputs, the result is Estimated Quarter-Mile ET = 13 sec, Estimated Trap Speed = 112.9 mph and Estimated 0 - 60 MPH = 7.8 sec. Each value corresponds to the declared output fields.
Common Use Cases
- Estimate drag racing quarter-mile time from horsepower and vehicle weight
- Calculate trap speed for a given HP/weight combination
- Compare performance of different vehicles at the drag strip