PaediCalc's child growth calculator turns your child's age, height and weight into an approximate percentile band for height, weight and BMI-for-age. No sign-up, no jargon — just clear numbers you can talk through with your pediatrician.
A growth percentile tells you how your child's measurements compare with children of the same age and sex. If your daughter is on the 60th percentile for height, roughly 60 of every 100 children her age and sex are shorter and 40 are taller. It is a position on a spectrum, not a grade — there is no 'pass' percentile.
Pediatricians care less about any single measurement and more about the pattern over time. A child who has tracked near the 40th percentile since infancy is usually showing healthy, consistent growth, even if a friend sits at the 75th. What prompts a closer look is when a child's curve crosses percentile lines sharply or flattens out, which is why well-child visits plot height and weight on a growth chart at every appointment.
Our child growth calculator brings that chart to your pocket. Enter a measurement and you'll get an approximate percentile band — an illustration of where your child may sit. A children's growth percentile calculator is a guide for conversations, not a diagnosis, and it works best alongside professional measurements taken at check-ups.
Everything on one screen, designed to inform rather than diagnose.
Enter height, length or weight and the calculator plots it against established WHO and CDC growth references, returning an estimated band such as 'around the 50th–75th percentile'. Like any baby growth chart calculator, the result is illustrative — a starting point for understanding, not a medical finding.
From age two, the tool doubles as a child BMI calculator, translating height and weight into BMI and showing how it compares with children of the same age and sex. For babies under two, weight-for-length is used instead, because BMI is not applied at that age.
A colour-coded indicator shows at a glance whether the estimate falls inside the typical range, and a metric/imperial toggle lets you work in centimetres and kilograms or feet, inches and pounds — handy for expat families juggling records from different countries.
Not necessarily. Percentiles describe variety, not health — many perfectly healthy children sit outside the middle bands. What matters most is steady progress along your child's own curve. Share any sharp jumps or dips with your pediatrician, who can interpret them in context.
Routine well-child visits usually cover it: frequently in infancy, then periodically through childhood. At home, checking every few months is plenty — growth happens slowly, and small day-to-day differences in measurement can look like changes that aren't really there.
No. PaediCalc is an educational tool with illustrative estimates. Clinic measurements use calibrated equipment and are interpreted alongside your child's full history, so keep regular appointments and bring your questions with you.
Slightly. Babies under two are measured lying down (length) and tracked on infant charts, while toddlers from age two are measured standing (height) and BMI-for-age joins the picture. Our calculator adjusts for this automatically based on the age you enter.