Gearbox Ratio Calculator

Find the optimal gearbox reduction ratio to match motor output to load requirements. Calculate output torque, speed, and reflected inertia.

Motor Rated Speed (RPM)

Motor Rated Torque (N*m)

Motor Rotor Inertia (kg*cm²)

Required Load Speed (RPM)

Required Load Torque (N*m)

Load Inertia (kg*cm²)

Gearbox Efficiency (%)

Required Gear Ratio

:1 reduction

Output Torque (at ratio)

N*m

Output Speed

RPM

Reflected Inertia

kg*cm²

Inertia Match Ratio

reflected/motor

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