COI calculator for cats · Breeder Pro and Breeder Elite

Cat Inbreeding Coefficient (COI) Calculator & Test Mating Tool

Before you plan a mating, pick a King and a Queen and Purrline calculates the Wright's coefficient of inbreeding the kittens would have, lists the shared ancestors and how much each contributes, and gives a simple Low, Moderate or Elevated rating.

How it works

1. 1

   Choose a pair

   Select any King and Queen from your cattery.

2. 2

   Choose the depth

   Calculate across 3, 4 or 5 generations.

3. 3

   Read the result

   See the COI percentage, a risk rating and the common ancestors.

What you get

• Wright's coefficient of inbreeding
• 3, 4 or 5 generation depth
• Common ancestor breakdown
• Low / Moderate / Elevated rating
• Test any pairing before mating

Questions

Related features

Planning a litter? Try the free cat gestation calculator or browse our breed guides.