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Blood Type Calculator

Calculate possible blood types from parents

Blood Type Inheritance Table

Father \ Mother	A+	A-	B+	B-	AB+	AB-	O+	O-
A+	A+, A-, O+, O-	A+, A-, O+, O-	A+, A-, B+, B-, AB+, AB-, O+, O-	A+, A-, B+, B-, AB+, AB-, O+, O-	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-, AB+, AB-	A+, A-, O+, O-	A+, A-, O+, O-
A-	A+, A-, O+, O-	A-, O-	A+, A-, B+, B-, AB+, AB-, O+, O-	A-, B-, AB-, O-	A+, A-, B+, B-, AB+, AB-	A-, B-, AB-	A+, A-, O+, O-	A-, O-
B+	A+, A-, B+, B-, AB+, AB-, O+, O-	A+, A-, B+, B-, AB+, AB-, O+, O-	B+, B-, O+, O-	B+, B-, O+, O-	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-, AB+, AB-	B+, B-, O+, O-	B+, B-, O+, O-
B-	A+, A-, B+, B-, AB+, AB-, O+, O-	A-, B-, AB-, O-	B+, B-, O+, O-	B-, O-	A+, A-, B+, B-, AB+, AB-	A-, B-, AB-	B+, B-, O+, O-	B-, O-
AB+	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-, AB+, AB-	A+, A-, B+, B-	A+, A-, B+, B-
AB-	A+, A-, B+, B-, AB+, AB-	A-, B-, AB-	A+, A-, B+, B-, AB+, AB-	A-, B-, AB-	A+, A-, B+, B-, AB+, AB-	A-, B-, AB-	A+, A-, B+, B-	A-, B-
O+	A+, A-, O+, O-	A+, A-, O+, O-	B+, B-, O+, O-	B+, B-, O+, O-	A+, A-, B+, B-	A+, A-, B+, B-	O+, O-	O+, O-
O-	A+, A-, O+, O-	A-, O-	B+, B-, O+, O-	B-, O-	A+, A-, B+, B-	A-, B-	O+, O-	O-

Calculate Possible Blood Types

Father's Blood Type

Mother's Blood Type

Select both parents' blood types to see possible results

About Blood Type Inheritance

Blood type is determined by the ABO gene and Rh factor inherited from parents. Each parent contributes one allele (A, B, or O) to their child, determining the child's blood type.

Type A: AA or AO genotype

Type B: BB or BO genotype

Type AB: AB genotype

Type O: OO genotype

Rh Factor:

• Rh+ (positive) is dominant over Rh- (negative)

• Two Rh- parents can only have Rh- children

• Rh+ parents can have Rh- children if both carry the recessive gene

Note: This calculator provides theoretical probabilities based on Mendelian inheritance. Actual results may vary. For medical purposes, always consult a healthcare professional.

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