Gear Ratio Calculator

⚙️

Calculate gear ratio, output RPM, output torque, and speed/torque relationships

Drive Teeth Driven Teeth Input RPM Input Torque (Nm)

Results

Ratio: 3.00 : 1

Output: 333.33 RPM · 150.00 Nm

Gear Ratio

3.00

Output RPM

333.33

Output Torque (Nm)

150.00

About: The gear ratio is the ratio of driven teeth to drive teeth. It determines the mechanical advantage: a higher ratio increases torque but decreases output RPM, and vice versa. Gear Ratio = Driven Teeth / Drive Teeth, Output RPM = Input RPM / Ratio, Output Torque = Input Torque × Ratio.