Blood Type Calculator
Predict your baby's possible blood type based on both parents' ABO type and Rh factor using genetic probability.
Parent 1
Parent 2
How Blood Type Inheritance Works
Blood type is determined by the ABO gene. Each parent passes one allele (A, B, or O) to the child. A and B are co-dominant, while O is recessive. The Rh factor (positive or negative) follows a similar dominant/recessive pattern.
Features
- ABO blood type probability prediction
- Rh factor (positive/negative) probability
- Visual probability bars
- 100% client-side calculations
Disclaimer: This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.