Free online blood type inheritance calculator: from the parents' ABO blood types, estimate the possible blood types of a child and their probabilities. A handy way to learn ABO inheritance; for reference only, all calculated locally.
Blood type
Probability
Based on ABO inheritance rules, estimate the possible blood types of children and their probabilities from the parents' blood types (counting all equally likely parental genotype combinations). For reference only, not for medical use; all calculated locally.
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Create a short link so you can reopen or download the result on other devices.