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CGCADGuide.tools
Free Mechanical Engineering Tool

Gear Ratio Speed & Torque Calculator

Calculate gear ratio, output RPM, output torque, and center distance for spur gear pairs, multi-stage trains, and planetary gear sets.

Parameters

Results

Gear Ratio
3.000:1
3.000:1 reduction
Output Speed
600.0 RPM
From 1800 RPM input
Output Torque
147.0 Nm
From 50 Nm input
Center Distance
80.0 mm
a = m(z₁+z₂)/2
Ratio = z₂/z₁. Output RPM = Input RPM / Ratio. Output Torque = Input Torque × Ratio × Efficiency. Center distance = m × (z₁ + z₂) / 2.
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