Gear Ratio RPM Calculator

Given input, this calculator will generate three tables:

• Highway - engine RPM for a range of U.S. highway speeds
• Stoplight Launch - engine RPMs from 0 to 20mph
• Crawling - engine RPM for a range of offroad "crawling" speeds

Choose your setup below and hit the Calculate button to generate the RPM tables.

*If you do not know your tire height in inches, try this calculator.