Handy automotive calculators to help you get the right numbers.
Calculate your vehicle speed based on tire size, gear ratio and engine RPM.
Convert between metric and standard tire sizes.
Enter the metric tire size below (e.g. 265/75R16)
Enter the standard tire size below (e.g. 31x10.50R15)
Estimate quarter-mile performance based on vehicle weight, horsepower, elapsed time (ET), and trap speed. Results are based on sea level and standard atmospheric conditions.
Convert 1/8 mile ET to estimated 1/4 mile ET.
