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The 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.
This calculator uses the inheritance patterns of the ABO and Rh blood group systems to predict possible blood types. Since this is a probability calculator, it is recommended to confirm the results with a blood test performed by your doctor.
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.
If you want to know which blood type you can receive from or donate to, use my Blood Donor Calculator.
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