Available
Baby hair color predictor
Uses parents' and grandparents' natural hair colors to show likely shades and the chance of red hair.
Open the predictor →Free · Private · Science-based
What traits could your baby inherit?
Free calculators that show which traits are likely, possible or rare for your baby, based on how inheritance actually works. Every tool explains its assumptions and tells you honestly how accurate it is.
- Your answers stay on your device. Calculations run in your browser. We do not send or store the traits you enter. See our privacy policy.
- Honest about accuracy. Blood type follows clear rules. Hair and eye color depend on many genes, so we show likelihood levels instead of made-up percentages.
- Sources you can check. Each tool links to medical and scientific references, and our methodology page explains every rule.
Baby trait tools
In progress
Baby blood type calculator
Will show every possible and impossible ABO and Rh blood type for your baby, with exact inheritance odds.
Coming soonIn progress
Baby eye color predictor
Will estimate brown, green and blue eye outcomes from parents' and grandparents' eye colors.
Coming soonHow it works
- Pick your family's traits Tap the natural colors of both parents, and grandparents if you know them.
- See what fits your family Each outcome is marked likely, possible, less likely or rare, with the reason why.
- Learn the genetics Short, plain-English explanations show what the result can and cannot tell you.