Gear Ratio Calculator
Calculate Gear Ratio
Formula
Gear Ratio = Driven Teeth / Driving Teeth. Output RPM = Input RPM / Ratio. Torque Multiplier = Ratio.
Frequently Asked Questions
How is gear ratio calculated?
Gear ratio = driven gear teeth / driving gear teeth. A ratio of 2:1 means the driven gear has twice as many teeth and rotates at half the speed with double the torque.
What is a reduction gear?
A reduction gear has a ratio greater than 1:1, meaning the output speed is slower but the torque is multiplied. This is common in transmissions, where lower gears provide more torque for acceleration.
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