Bolt Size & Torque
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Gear Ratio Calculator
Enter tooth counts and input speed to estimate ratio, output speed, and torque (incl. efficiency).
Gear Ratio Calculator
Enter tooth counts and input speed; the tool calculates ratio, output speed, and torque (incl. efficiency).
Ratio i = z2 / z13.000
Output speed n2 [rpm]500.0
Output torque T2 [Nm]145.5
Efficiency η0.970
Note: Output torque includes efficiency factor η.
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Exports inputs and outputs only.
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Formula
i = z2 / z1 | n2 = n1 / i | T2 = T1 * i * η
Assumptions
- Ideal gear ratio; backlash and elasticity are neglected.
- Efficiency ? is represented by a single factor.
References
- AGMA 2001 (Fundamental gear design)
- ISO 6336 (Cylindrical gears)
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