Trait predictions

Eye Color Predictor

Polygenic eye-color predictor with optional grandparents — far better than the 1907 Punnett square.

Baby Hair Color Predictor

Polygenic hair-color projection from parents' childhood + current hair, including the redhead carrier path.

Curly Hair Predictor

Curly hair probability based on parent texture and grandparent traits.

Baby Blood Type Predictor

ABO + Rh inheritance with full Mendelian probability distribution from both parents.

Adult Height Predictor

Project your child's adult height from parent heights using the Mid-Parental formula. ±2″ confidence range.

Baby Growth Percentile Calculator

WHO + CDC growth percentile from a single measurement, with clinical-grade LMS math.

Baby Name Popularity

See how popular any baby name has been since 1880, using the official SSA dataset.

Baby Name Compatibility

Does the name sound right with your last name? Rhythm, syllables, and flow scored.