Chains & Sprockets
Sprocket RPM Calculator
Enter driver speed and both sprocket tooth counts to calculate the ideal driven shaft RPM.
Inputs
Formula
Driven sprocket speed
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 speed
- 900 rpm
- Driver sprocket teeth
- 20 teeth
- Driven sprocket teeth
- 60 teeth
Result
- Driven speed
- 300 rpm
Related calculators
Continue your workflow with a related calculation.
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Sprocket Ratio Calculator
Calculate chain-drive speed ratio from driver and driven sprocket tooth counts.
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Sprocket Teeth Calculator
Estimate the driven sprocket tooth count needed for a target RPM.
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Chain Speed Calculator
Calculate roller-chain linear speed from chain pitch, sprocket teeth, and RPM.
Frequently asked questions
Does this calculator include chain slip?
Chain drives are treated as positive drives here, so the calculation uses the tooth-count ratio without a slip allowance.
What if the driven sprocket has more teeth?
The driven shaft turns slower than the driver, with a proportional increase in ideal torque before losses.