Blood Group Calculator
ABO and Rh Blood group calculator shows what could be the possible blood group or blood type of a child, given the blood groups of biological parents.
Blood Type Probabilities
Blood Type Compatibility
Understanding Blood Group Inheritance
The ABO blood group system is determined by the presence or absence of antigens A and B on red blood cells. The Rh factor (positive or negative) is another important blood group marker. This blood type calculator helps predict possible blood types of children based on their parents' blood groups.
How Blood Types Are Inherited
Each biological parent donates one of their two ABO alleles to their child. The A and B alleles are dominant while O is recessive. The Rh factor follows a similar pattern with Rh+ being dominant over Rh-.
Why Blood Type Matters
Knowing blood types is crucial for blood transfusions, pregnancy (Rh incompatibility), and understanding genetic inheritance patterns. Our calculator provides probabilities based on established genetic principles.
Blood Type Distribution Worldwide
The most common blood type globally is O+, while the rarest is AB-. Blood type distributions vary by ethnicity and geographic region, making this calculator useful for diverse populations.