Predict your 1/4 mile time and speed from weight and horsepower.
Car + Driver + Fuel
Flywheel Horsepower (BHP)
Predicting quarter-mile performance is a mix of physics and experience. The calculator uses the **Hale Formula**, widely accepted in the racing community for its accuracy in predicting performance for naturally aspirated vehicles with good traction.
ET = 5.825 × (Weight / HP) ^ 1/3MPH = 234 × (HP / Weight) ^ 1/3While horsepower and weight are the biggest factors, they aren't the only ones. Real-world times are affected by:
This calculator uses the Hale formula, which is a standard industry estimation. It assumes good traction and optimal shifting. Real-world results may vary due to tires, driver skill, and weather.
Use Race Weight. This includes the car, driver, fuel, and any cargo in the vehicle at the time of the run.
Common factors include wheel spin (traction loss), slow shifting, high altitude (less oxygen for engine), or hot weather.
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