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Child Blood Type Calculator

Estimate Possible Blood Types of the Child Based on Parents' Blood Types

🧬 About ABO Blood Type Inheritance:

Basic Knowledge:Human ABO blood type is determined by the ABO gene on chromosome 9. Each person has two blood type genes, one from the father and one from the mother.

Genotype and Phenotype:
  • Blood Type A:Possible genotypes are AA or AO.
  • Blood Type B:Possible genotypes are BB or BO.
  • Blood Type AB:The genotype can only be AB.
  • Blood Type O:Genotype can only be OO
Inheritance Pattern:
  • A and B genes are dominant over the O gene, meaning A combined with O results in type A, and B combined with O results in type B
  • There is no dominance relationship between A and B genes; the AB combination results in type AB
  • A child's blood type genes come half from the father and half from the mother
  • Parents with blood type O can only have children with blood type O
  • Parents with blood type AB cannot have children with blood type O

📋 Quick Reference Table for Common Blood Type Combinations:

Father's Blood Type Mother's Blood Type Possible Blood Types of the Child Impossible Blood Types of the Child
AAA、OB、AB
ABA、B、AB、ONone
AABA、B、ABO
AOA、OB、AB
BBB、OA、AB
BABA、B、ABO
BOB、OA、AB
ABABA、B、ABO
ABOA、BAB、O
OOOA、B、AB
⚠️ Important Notice:
  • This tool is for reference and educational purposes only; results are based on Mendelian genetics
  • Actual blood type must be confirmed through medical testing
  • In rare cases, gene mutations or other special conditions may occur
  • Blood type should not be used as the sole basis for paternity testing
  • For medical concerns, please consult a professional healthcare provider