Home
Back
Conversion Formula:
| From: | To: |
The eighth mile to quarter mile conversion is used in drag racing to estimate quarter mile elapsed time (ET) based on eighth mile performance. This conversion helps racers predict their quarter mile times without having to run the full distance.
The calculator uses the standard conversion formula:
Where:
Explanation: The multiplier 1.554 is derived from empirical data and represents the typical relationship between eighth mile and quarter mile performance for most vehicles.
Details: Accurate ET conversion is crucial for drag racers to estimate quarter mile performance, plan racing strategies, and compare vehicle performance across different track lengths.
Tips: Enter your eighth mile elapsed time in seconds. The value must be greater than 0. The calculator will provide the estimated quarter mile time.
Q1: How accurate is the 1.554 conversion factor?
A: The 1.554 multiplier is a general approximation that works well for most vehicles, but actual conversion may vary based on vehicle type, power delivery, and track conditions.
Q2: Does this conversion work for all types of vehicles?
A: While generally applicable, the conversion may be less accurate for vehicles with unusual power curves or those that are traction-limited in the first half of the run.
Q3: Can I use this for professional racing calculations?
A: This provides a good estimate for amateur and enthusiast use, but professional teams typically use more sophisticated models that account for specific vehicle characteristics.
Q4: Why is there a conversion factor instead of simple doubling?
A: Vehicles typically slow down in the second half of the quarter mile due to aerodynamic drag and other factors, making the relationship non-linear.
Q5: What are typical eighth and quarter mile times?
A: Performance varies widely by vehicle, but a car running 8.0 seconds in the eighth mile would typically run about 12.4 seconds in the quarter mile using this conversion.