Blood Type Calculator
Calculate child blood type probability from parents
両親の血液型を選択
子供の血液型確率
| 血液型 | 確率 |
|---|---|
| A | — |
| B | — |
| O | — |
| AB | — |
About Blood Type Calculator
The Blood Type Calculator is a web tool that calculates the probability of a child's blood type from parents' blood types based on Mendelian genetics. ABO blood types are determined by combinations of A, B, and O alleles, where A and B are dominant over O.
For example, a parent with type A blood may carry either AA or AO genotype, and each parent contributes one allele to their child. Simply select the father's and mother's blood types to calculate the probability of the child being type A, B, O, or AB, displayed as percentages with colorful bar graphs.
This tool serves as an educational resource for learning genetics fundamentals and as reference information before childbirth. All calculations are performed entirely in your browser — no input data is transmitted to any server.
How to use Blood Type Calculator
- Select the father's blood type from A, B, O, or AB.
- Select the mother's blood type from A, B, O, or AB.
- Review the child's possible blood type probabilities as percentages and bar graphs.
- Use the result as a genetics learning reference, not as a medical decision.
Benefits of Blood Type Calculator
- Probability calculations based on Mendelian genetics help explain ABO inheritance patterns.
- Visual bar graphs make it easier to compare the likelihood of A, B, O, and AB blood types.
- All 16 parent blood type combinations are covered for basic family-reference checks.
- Browser-only processing keeps the selected family information on your device.
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