Gears
Gear Teeth Calculator for Target RPM
Enter driver tooth count, driver RPM, and desired driven RPM to calculate the ideal driven tooth-count target.
Inputs
Formula
Required driven tooth count
Worked example
Using the default values shown in the calculator, the same formula gives the following result. This is a quick sanity check for the calculation, not a design recommendation.
Inputs
- Driver gear teeth
- 20 teeth
- Driver speed
- 1,450 rpm
- Target driven speed
- 483.33 rpm
Result
- Calculated driven tooth count
- 60 teeth
Related calculators
Continue your workflow with a related calculation.
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Gear RPM Calculator
Calculate driven gear RPM from driver RPM and the tooth counts of a simple external gear pair.
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Gear Ratio Calculator
Calculate ideal external gear ratio from driver and driven gear tooth counts.
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Gear Pitch Diameter Calculator
Calculate standard metric spur-gear reference diameter from module and number of teeth.
Frequently asked questions
Can I use a fractional tooth count?
No. The result is a ratio target. Choose a practical whole tooth count and recalculate the actual driven RPM.
What else limits gear tooth count?
Gear geometry, undercut risk, module, pressure angle, center distance, strength, and available stock sizes can constrain the practical choice.