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Quarter Mile Elapsed Time Formula:
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The quarter mile elapsed time formula estimates the time it takes for a vehicle to complete a quarter mile (1,320 feet or 402 meters) based on its weight and horsepower. This calculation is commonly used in automotive performance testing and drag racing.
The calculator uses the quarter mile elapsed time formula:
Where:
Explanation: The formula calculates the cube root of the weight-to-power ratio and multiplies it by a constant factor to estimate the quarter mile time.
Details: Quarter mile elapsed time is a standard performance metric in automotive racing and testing. It provides a quick comparison of vehicle acceleration capabilities and is widely used by car enthusiasts, manufacturers, and racing professionals.
Tips: Enter vehicle weight in pounds and engine horsepower. Both values must be positive numbers. The calculator will provide the estimated quarter mile elapsed time in seconds.
Q1: How accurate is this formula?
A: This formula provides a good estimate for most vehicles, but actual performance may vary based on traction, transmission type, aerodynamics, and other factors.
Q2: What is considered a good quarter mile time?
A: Times vary by vehicle type: economy cars (15-17 seconds), sports cars (12-14 seconds), supercars (10-12 seconds), and professional drag cars (under 7 seconds).
Q3: Does this include driver weight?
A: The formula uses total vehicle weight. For accurate results, include driver weight and any additional cargo in your calculation.
Q4: Can this formula be used for electric vehicles?
A: Yes, but electric vehicles may perform differently due to instant torque delivery. The formula provides a reasonable estimate.
Q5: What factors affect quarter mile times besides weight and horsepower?
A: Traction, gearing, aerodynamics, tire type, transmission efficiency, and launch technique all significantly impact actual quarter mile performance.