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Gear Ratio Calculator

Find the output speed and torque of a gear increaser with this
Gear Ratio Calculator.

A gear reducer increases torque and decreases speed.  A gear
increaser reduces torque and increases speed.  This calculator
determines output torque and speed for a speed increaser.

Input Torque (in/lbs):
Input Speed (RPM):
Ratio: :1
Fill in input torque, input speed, and ratio to determine
output torque and speed.

To find the output torque and speed of a gear increaser, use the

Ouput Torque = Input Torque x Ratio of Gear Increaser

Torque is measured in Inch Pounds

Output Speed = Input Speed / Ratio of Gear Increaser

Example: A gear increaser with 1000 in/lbs of input torque, an input
speed of 2000 RPM, and a ratio of .20:1 is:

Output Torque = 1000 x .20

Output RPM = 2000 / .20

Calculated out this gives an output torque of 200 in/lbs and an output
speed of 10,000 RPM. (rounded to the nearest 10,000th)