9852 Katella Ave, Ste 361, Anaheim, CA 92804                Phone: 657-221-0432

Drivetrain Calculator

Select what you wish to calculate.
Fill in all boxes except the one you want to calculate.
Make the selections for Miles vs. Kilometers and then click the "Calculate" button.

For now, this calculator only works in Internet Explorer or Firefox browsers. It doesn't work with Chrome or Safari browsers due to differences in their handling of JavaScript. We are working to develop a compatible version.

I want to find out the:   

Engine RPM
Transmission Final Ratio
in decimal format (i.e. 0.875)
Differential Ratio
in decimal format (i.e. 4.56)

Tire Revolutions Per

from tire mfg. specifications


Due to rounding, Differential or Transmission ratios may have a 0.005 variance in the results. Calculations with a mixture of metric and U.S. units of measure may result in more variance (i.e. using a metric tire rotations with a speed in MPH generates the biggest variance.)