Baby Percentile Calculator
Estimate adult height from parent heights or compare infant growth with a simplified WHO-reference model.
Compare infant weight and length with a simplified interpolation around WHO reference medians. It is a screening estimate, not an official percentile calculation or pediatric diagnosis.
Growth Planning Summary
Frequently Asked Questions
What is the Mid-Parental Height formula?
The mid-parental height formula adds maternal and paternal heights, adjusts for the child's sex (+13cm for boys, -13cm for girls), and divides by two. This yields a target height that aligns with the couple's genetic potential.
How accurate is genetic height prediction?
It is a statistical midpoint. Most children (95%) will end up within +/- 8.5 cm (3.3 inches) of the predicted target, although nutrition, exercise, and health also matter.
What does a baby percentile mean?
A 75th-percentile estimate generally means a measurement is above about 75% of the reference group. This calculator uses sparse medians and an approximate normal model, so confirm growth tracking with official charts and a pediatric professional.