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Blood Type Calculator (Child’s Blood Group from Parents)

Find which blood groups (ABO and Rh) a child can inherit from the parents – with percentages – plus a blood donation compatibility chart.

Health & Fitness Free Private

Enter values

What is the Blood Type Calculator?

Blood group is inherited from both parents. Each parent passes one ABO gene (A, B or O) and one Rh gene (+ or −). Choose both parents’ blood groups and the calculator lists every possible blood group for their children with approximate chances. Also see who can donate to whom.

How to use the Blood Type Calculator

  1. Select the mother’s and father’s blood groups.
  2. See possible child blood groups and chances.
  3. Check the donation compatibility table.

Note

Percentages assume the most likely hidden genes. Rare variants (e.g. Bombay phenotype, cis-AB) can give unexpected results – this is not a paternity test.

This Blood Type Calculator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.

Last updated: · By NodifyTech

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