Randy's Ring & Pinion. Calculators.

Low prices on Gear Packages, Axle Kits, Ring & Pinions, Lockers, Pozi's, Kits, etc.

Find Tips, FAQs, and How-To Technical Help on Gears, Ring & Pinions, C-Clips, Carriers, Limited Slips, Locking Differentials, Positraction, Worms, Assembly, Yukon products, Bearing Pullers, Housing Spreader, Super Joint Installation, Noise, Differentials, Spedometers, rearend parts, driveline angles & vibration, etc.

Calculators for RPM, Tire Height, Gear Ratio, Engine Displacement, Inches to Liters, Rod Ratio, Horsepower, etc.

Brochure Requests, Information Kits, Policies, Promotions, Contact Us

Key Word Index

Search for Parts and Differentials by vehicle Make & Model. Buick,Oldsmobile,Pontiac,Chrysler,Dodge,Plymouth,Ford,Lincoln,Mercury,GM,GMC,Chevrolet,Hummer,International,Isuzu,Jaguar,Jeep,AMC,Mazda,Suzuki,Toyota,Volvo

Search for Parts and Differentials by Part Types. 3rd Members,Axles,Axle Bearings,Cases,Spider Gears,Drop-Outs,Installation Kits,Lockers,Pinion Supports,Positrations,Rings,Pinions,Shims,Seals,Spools,Mini-Spools,Tools,U-Joints,Yokes

Search for Parts and Differentials by Differential Type. AMC, Chrysler, Dana Spicer, Ford, GM, Suzuki, Toyota

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.

RPM Calculator RPM & Tire Height Calculator
Gear Ratio Calculator
Engine Displacement Calculator
Cubic Inches to Liters & Liters to Cubic Inches Calculator
Rod Ratio Calculator
Horsepower Calculator

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.

Randy's Ring & Pinion makes no guarantee to the accuracy of calculations. Please email with any calculation errors.