SMALL TOOLS. PRECISE CALCULATIONS.

Gear Ratio & RPM Calculator

Practical calculators for motors and machinery.
Built for your workbench, and your phone.

Free to useNo installationEnglish / 한국어

TOOLS 01—04

Calculate output RPM from input speed and reduction ratio.

YOUR RESULT

Formula & how it works

These tools provide basic calculations under ideal conditions. Check manufacturer specifications and losses when applying results.

How to use

Enter input RPM and the reduction factor. Enter 60 for a 1:60 reducer.

1,750 RPM ÷ 60 = 29.1667 RPM

A larger reduction factor lowers output speed. Check the gearbox rated input speed and permissible torque in its manufacturer specifications.

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