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Ack's Generic Gearing Calculator

Now with KPH Results!

This Gear Calculator is set up for manual input of gearing parameters for any type of drivetrain component.

CALCULATE:
Enter a gearing value in each of the fields below.

OPTIONS:
Enter an Engine RPM and the actual Tire Diameter to calculate the ground speed based on the overall ratio.

Differential Ratio:

Transfer case Ratio:

Transmission gear Ratio:

Engine RPM:

Tire Diameter:

Calculate