Blood Type Calculator

Determine the possible blood types of your children based on the blood types of both parents using Mendelian genetics principles.

How to Use This Calculator

Select the blood type of the first parent from the dropdown menu
Select the blood type of the second parent from the dropdown menu
Review your selections to ensure accuracy
Click Calculate to see the possible blood types for your children

Formula Used

Blood Type Inheritance = Mendelian Genetics

Where:

Parent 1 Blood Type = Blood type of first parent (A, B, AB, or O)
Parent 2 Blood Type = Blood type of second parent (A, B, AB, or O)
Child Blood Type = Possible blood types based on genetic combinations

Example Calculation

Real-World Scenario:

A couple where one parent has Type A blood and the other has Type B blood wants to know the possible blood types for their children.

Given:

Parent 1 Blood Type = Type A
Parent 2 Blood Type = Type B

Calculation:

Type A parent can pass A or O alleles. Type B parent can pass B or O alleles. The possible combinations are: AB, AO, BO, OO.

Result: Children could have Type A, Type B, Type AB, or Type O blood (all four types are possible).

Why This Calculation Matters

Practical Applications

Family planning and genetic counseling
Blood transfusion compatibility planning
Understanding genetic inheritance patterns
Medical emergency preparedness

Key Benefits

Quick determination of possible blood types
Understanding genetic probability
Useful for medical professionals and families
Helps with blood donation and transfusion decisions

Common Mistakes & Tips

Remember that blood type (A, B, AB, O) is separate from the Rh factor (positive or negative). This calculator only determines the ABO blood type inheritance, not the Rh factor. For complete blood type prediction, you would need to consider both systems separately.

Blood type inheritance follows Mendelian genetics, but real-world outcomes can vary. This calculator provides probabilities based on genetic principles, but actual results may differ due to complex genetic interactions and rare genetic variations.

Frequently Asked Questions

No, two Type O parents can only have children with Type O blood. This is because Type O individuals have two O alleles (OO), and can only pass O alleles to their offspring.

Type AB parents can have children with Type A, Type B, or Type AB blood, depending on the blood type of the other parent. They cannot have children with Type O blood.

This calculator uses established Mendelian genetics principles and provides accurate probability predictions for ABO blood type inheritance. However, it's important to confirm actual blood types through medical testing, as there can be rare genetic variations that affect blood type expression.

References & Disclaimer

Medical Disclaimer

This blood type calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Blood type inheritance is based on established genetic principles, but individual results may vary. Always consult with healthcare professionals for medical decisions and confirm blood types through proper medical testing.

References

American Red Cross - Blood Types - Comprehensive information about blood types and inheritance patterns
Johns Hopkins Medicine - Blood Types and Inheritance - Medical information on blood type genetics
NCBI Bookshelf - Human Genetic Variation - Scientific resource on human blood type genetics

Accuracy Notice

This calculator uses standard Mendelian genetics principles to predict possible blood types. Results are based on probability and may not reflect rare genetic mutations or variations. For accurate determination of blood types, consult medical professionals and undergo proper blood typing tests.

About the Author

Kumaravel Madhavan

Web developer and data researcher creating accurate, easy-to-use calculators across health, finance, education, and construction and more. Works with subject-matter experts to ensure formulas meet trusted standards like WHO, NIH, and ISO.

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