Blood Type Calculator
Calculate the possible blood types of your child based on parents' genetics. Interactive ABO and Rh factor inheritance calculator with visual Punnett square analysis.
Mother's Blood Type
Select blood type
Father's Blood Type
Select blood type
Child's Possible Blood Types
Based on genetic inheritance patterns
Important Note
These are theoretical probabilities based on Mendelian genetics. Actual inheritance can be affected by rare genetic variations.
ABO Inheritance Punnett Square
Rh Factor Inheritance
Understanding Blood Type Inheritance
Blood type is determined by alleles inherited from both parents. Here's how the genetics work:
A Allele
Dominant over O. Produces A antigens on red blood cells.
B Allele
Dominant over O. Produces B antigens on red blood cells.
O Allele
Recessive. Produces no antigens on red blood cells.
Rh+ Allele
Dominant. Produces Rh factor protein on red blood cells.
Rh- Allele
Recessive. Does not produce Rh factor protein.
🧪 Common Blood Type Combinations
A+ × B+ Parents
Can produce children with A, B, AB, or O blood types
O+ × O+ Parents
All children will have O blood type
AB+ × O- Parents
Children can have A or B blood types
A- × A- Parents
Children can have A or O blood types, all Rh-negative
B+ × AB- Parents
Children can have A, B, or AB blood types
AB+ × AB+ Parents
Children can have A, B, or AB blood types
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