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RPM Calculator







Understanding RPM Calculation

The RPM (Revolutions Per Minute) calculation for a vehicle involves determining the rotational speed of the engine and the wheels based on the tire diameter, vehicle speed, and transmission ratio.

Formulas Used

Transmission Ratio:

Transmission Ratio=RPM×Tire Diameter336×Vehicle Speed

Wheel RPM:

Wheel RPM=Vehicle Speed×336Tire Diameter

Calculation Example

Suppose you are driving at 60 mph with a tire diameter of 23 inches and the engine RPM is 3500. Using the formulas:

Transmission Ratio:

Transmission Ratio=3500×23336×603.99

Wheel RPM:

Wheel RPM=60×33623877 RPM