Chain Length Calculator
Chain length in links for a two-sprocket drive from tooth counts, centre distance and pitch.
Compare Your Options And Get Clear Answers
Chain length in links for a two-sprocket drive from tooth counts, centre distance and pitch.
Chain Length Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
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Results update as you change the inputs.
Review
Read the breakdown and the explanation.
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Chain Quick Guide
Typical values for reference.
| Large teeth | Small teeth | Centre mm | Links |
|---|---|---|---|
| 40 | 15 | 300 | 76 links |
| 40 | 15 | 500 | 108 links |
| 40 | 15 | 700 | 140 links |
| 53 | 11 | 420 | 100 links |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Chain Length Calculator FAQ
Answers to common questions about this calculator.
Use the sprocket teeth, centre distance and pitch in the standard formula.
Odd links need an offset link.
L = 2C/p + (N + n)/2 + ((N – n)/(2 pi))^2 / (C/p).
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.