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Child Blood Type Calculator

Mother Blood Type:
Father Blood Type:
Type A Chance: %
Type B Chance: %
Type AB Chance: %
Type O Chance: %
Child RH Factor:
   
 

Parent Blood Type Calculator

Child Blood Type:
One Parent Blood Type:
Other Parent Blood Type:
   
 

Blood Type Genetic Basis:


In genetics, blood type gene has two alleles, each allele has genotype A, B or O. The A and B are dominant, and O is recessive. So allele A combined with allele O is type A. Similarly, BO is type B, AA is type A, BB is type B, OO is type O, and AB is type AB.

If both parents have type A blood, then the alleles could be AA or AO, thus the allele A frequency is 75%, allele O frequency is 25% for both parents.
So the chance of alleles OO is 25% × 25% = 6.25%,
alleles AA is 75% × 75% = 56.25%,
alleles AO is 75% × 25% = 18.75%,
alleles OA is 25% × 75% = 18.75%.
Since AA, AO and OA are blood type A, and OO is blood type O, thus their child has 6.25% chance to be blood type O and 93.75% chance to be blood type A.

The +/- is called the rhesus factor, with + being dominant, and - being recessive.
So if both parents are -, the kids are always -, otherwise the kids might be + or -.

Child Blood Type Estimate Table:
Father's Blood Type
A B AB O
Mother's
Blood
Type
A A/O A/B/AB/O A/B/AB A/O
B A/B/AB/O B/O A/B/AB B/O
AB A/B/AB A/B/AB A/B/AB A/B
O A/O B/O A/B O


Parent Blood Type Estimate Table:
Child's Blood Type
A B AB O
One
Parent's
Blood
Type
A A/B/AB/O B/AB B/AB A/B/O
B A/AB/O A/B/AB/O A/AB A/B/O
AB A/B/AB/O A/B/AB/O A/B/AB Impossible
O A/AB B/AB Impossible A/B/O



Blood Type Compatibility:


◊ Red Blood Cell (RBC):
Donor Blood Type
A+ A- B+ B- AB+ AB- O+ O-
Recipient
Blood
Type
A+ X X X X
A- X X X X X X
B+ X X X X
B- X X X X X X
AB+
AB- X X X X
O+ X X X X X X
O- X X X X X X X
◊ Plasma:
Donor Blood Type
A B AB O
Recipient
Blood
Type
A X X
B X X
AB X X X
O


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