Use this calculator to quickly convert your 1/8 mile times to equivalent 1/4 mile times to gauge your vehicle’s performance.
1/8 Mile Calculator
How to Use the 1/8 Mile Calculator
Enter your 1/4 mile elapsed time (ET) in the first input field, and your 1/4 mile trap speed (in mph) in the second input field. After you have entered these values, click on the “Calculate” button to see your approximate 1/8 mile elapsed time and trap speed.
How It Calculates Results
The calculator uses a standard estimation method to approximate 1/8 mile performance based on known 1/4 mile data. The elapsed time for the 1/8 mile is roughly 66.7% of the 1/4 mile time, and the trap speed at the end of the 1/8 mile is approximately 88% of the 1/4 mile trap speed.
Limitations of the Calculator
This calculator gives an approximate result based on common conversion formulas and is intended for estimation purposes only. Actual 1/8 mile times can vary based on a number of factors including, but not limited to, track conditions, weather, vehicle performance, and driver skill. Always verify your performance data through actual timed runs on a track for the most accurate results.