Blood Type Inheritance Calculator
Predict the possible blood types and Rh factors of offspring based on parental blood types.
Parental Blood Types
Parent 1
Parent 2
Possible Blood Types
AB+
18.8%
A+
18.8%
B+
18.8%
O+
18.8%
AB-
6.3%
A-
6.3%
B-
6.3%
O-
6.3%
ABO Type Probabilities
Type AB25%
Type A25%
Type B25%
Type O25%
Rh Factor Probabilities
Rh+75%
Rh-25%
Parental Genotypes
Parent 1
AO Dd
Parent 2
BO Dd
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
📚
Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.