Randy's Ring & Pinion. RPM Calculator.

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

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Enter Ratio, Tire Height, and Speed (mph) then click Solve to calculate RPM

Recommended Towing RPM
4 cyl	2200-3200
6 cyl	2000-3000
Big Block	1600-2600
Small Block	1800-2800
Ford 6.0L	1900-2400
Ford Diesel (Non-Turbo)	1600-2500
Ford Diesel (Turbo)	1400-2200
Dodge Diesel	1400-2200
GM Diesel 6.2L	1800-2800
GM Duramax Diesel	1800-2400

Transmission Gear Ratios Transmission Gear Ratio Chart

Tire Height Calculator

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