1. What is the Eighth to Quarter Mile Conversion?

The conversion from eighth mile to quarter mile elapsed time (ET) is a standard calculation in drag racing that estimates a vehicle's quarter mile time based on its eighth mile performance.

2. How Does the Calculator Work?

The calculator uses the standard conversion formula:

Where:

• \( ET_{1/8} \) — Elapsed time for the eighth mile (seconds)
• 1.57 — Standard conversion factor

Explanation: This formula provides a rough estimate of quarter mile time based on the vehicle's performance in the first eighth mile.

3. Importance of the Conversion

Details: This conversion is particularly useful for tracks that only have eighth mile capabilities but want to estimate quarter mile times, or for comparing performance between different length tracks.

4. Using the Calculator

Tips: Enter your eighth mile elapsed time in seconds. The value must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this conversion?
A: It provides a rough estimate but actual quarter mile times can vary based on vehicle characteristics and track conditions.

Q2: Does this work for all types of vehicles?
A: It works best for typical drag racing vehicles. Highly modified or unconventional vehicles may not follow this conversion.

Q3: Why is the factor 1.57?
A: This factor comes from empirical data showing the average relationship between eighth and quarter mile times for most vehicles.

Q4: Can I use this for other distance conversions?
A: No, this specific factor only applies to eighth to quarter mile conversions.

Q5: What's the typical quarter mile time for a street car?
A: Performance street cars typically run 12-14 seconds, while average cars are in the 15-17 second range.