Blood Type Calculator
The Blood Type Calculator
With the Free Online Blood Type Calculator, you can determine which blood type you or your child could have based on the blood types of the biological parents.
Since this is a probability calculator, it is recommended to confirm with absolute certainty by conducting a blood test with your doctor.
If you want to know which blood type you can receive from or donate to, use my Blood Donor Calculator.
Instructions
Select mother's blood type: Choose the biological mother's blood type from the dropdown menu. Options include A, B, AB, or O, each with positive or negative Rh factor.
Select father's blood type: Choose the biological father's blood type from the dropdown menu. Similarly, options are available for A, B, AB, or O, each with positive or negative Rh factor.
Calculate: Click on the "Calculate" button.
Results: The results will display the probabilities (in percentages) for each blood type (A, B, AB, O) and Rh factor (Rh+ and Rh-) based on the blood types of the biological parents for you or potential offspring.