How does the Gear Ratio Calculator work?

Ratio = N_input / N_output = N_driven / N_driver = T_output / T_input Then: Spur gears: ratio = number of teeth on driven / number on driver Then: Power is conserved: P = T × ω.

Can you give an example of how to use the Gear Ratio Calculator?

Example: Input Input 1800 rpm, output 600 rpm gives a result of Gear ratio = 3:1 (3× speed reduction, 3× torque increase) (Power unchanged).

Is the Gear Ratio Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Gear Ratio Calculator?

Our Gear Ratio Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Gear Ratio Calculator

Pinion Teeth (N1)

Gear Teeth (N2)

Input RPM

Gear ratio is the speed reduction/increase between input and output shafts. It determines torque multiplication and shaft speeds.

Difficulty:beginner

References

›Gear Ratio — Wikipedia

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Gear Ratio Calculator

Gear Ratio Calculator

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Gear Ratio Calculator