Gear Ratio Calculator

Calculate Gear Ratio, Speed, and Torque.

Gear Details

Driver Gear Teeth (Input)

Driven Gear Teeth (Output)

Input Speed (RPM) [Optional]

Input Torque (Nm) [Optional]

Gear Ratio

Output Speed

Output Torque

Formula: Ratio = Driven / Driver

Speed_out = Speed_in / Ratio

Torque_out = Torque_in * Ratio