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RANDYS Worldwide Automotive
Calculators
Math Made Easy!
Easy and simple—that’s how we want your rearend experience to be. For that reason we have made available for you a variety of online calculators to help you with your installation and other configurations. From RPM to metric conversion, we aim to have what you’re looking for.

Tire Height
Tire Height
RPM
RPM
Gear Ratio
Gear Ratio
Engine Displacement
Engine Displacement
Cubic Inches & Liters
Cubic Inches & Liters
Rod Ratio
Rod Ratio
Horsepower
Horsepower
Transmission Ratio RPM
Transmission Ratio RPM
Diff Wizard
Diff Wizard

Found what you’re looking for? Now you need more help?
Our highly trained parts representatives and technical staff are standing by to answer any questions you may have. We can help you select the highest quality parts that will meet your specific application. Meet Our Sales Team

Gear Toolkit iPhone App

RANDYS Worldwide Automotive makes no guarantee to the accuracy of calculations.
Please email with any calculation errors.