Calculate inbreeding
for your canaries

Use Wright's exact formula (1922) to compute the inbreeding coefficient (COI). Fill in the pedigree up to 4 generations, link common ancestors and discover the genetic risk level.

How it works: enter the ring number in each box. If the same ring appears more than once in the tree, it is automatically recognized as a common ancestor (boxes are highlighted in amber).

Calculate Inbreeding

How to calculate canary inbreeding

GenHub’s COI calculator applies Wright’s formula to the pedigree you enter (up to 4 generations) — so you can spot high-risk pairings early.

• Wright (1922) formula on the pedigree you enter
• Automatic common-ancestor detection via ring number
• Risk level and practical advice right after calculation

FAQ

What is the inbreeding coefficient (COI)?

The probability that two alleles at a locus are identical by descent. Higher COI means higher inbreeding-depression risk.

How many generations do I need?

This free tool uses up to 4 generations. Full GenHub computes COI across your whole aviary pedigree.

When is COI too high?

It depends on the line, but high values suggest bringing in outcross blood and planning pairings carefully.

Learn more: Canary genetics guide · Genetic predictor · Pairing guide