Child Growth Chart

The Child Growth Chart is a free online tool that track child growth with who/cdc percentile charts for weight-for-age, height-for-age, and bmi-for-age with classification badges.. It runs entirely in your browser with no installation or sign-up needed.

Simplified WHO (0-5) and CDC (2-18) reference data with 7 percentile columns at 17+ age points per sex.

Underweight <5th percentile, Healthy 5-85th, Overweight 85-95th, Obese >95th — per CDC guidelines.

No — approximate estimates only. Always consult a pediatrician for growth concerns.

Yes, the Child Growth Chart is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Yes, the Child Growth Chart is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Child Growth Chart in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Child Growth Chart uses industry-standard formulas and algorithms to ensure accurate results. However, for critical financial or medical decisions, always consult a qualified professional.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Child Growth Chart works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

A percentile compares your child to other children of the same age and sex, not to an ideal target. The 25th percentile for weight means roughly 25 percent of peers weigh less and about 75 percent weigh more — your child is on the lighter side of the normal range, which is perfectly common and not a problem on its own. Healthy children sit at every percentile from the 3rd to the 97th. What pediatricians watch is consistency: a child who has always tracked near the 25th line is usually growing exactly as expected, while a sudden jump or drop across several lines is the real signal to discuss. Enter your child's age, sex, weight, and height above to see their weight-for-age percentile against the 3rd through 97th reference markers.

Both are reference standards, but they describe different populations and ages. The WHO Child Growth Standards cover birth to about 5 years and are prescriptive — they show how children should grow under optimal conditions, based on breastfed children across several countries. The CDC Growth Charts cover roughly 2 to 18 years and are descriptive, reflecting how a U.S. reference population actually grew. Because of this, the two can give slightly different percentiles in the overlapping 2-to-5-year window, with WHO often placing healthy young children a little differently than CDC. This tool uses WHO data for the early years and CDC data for older children, matching common clinical practice. It covers ages from 0 up to 216 months. Enter your child's details above to see percentiles drawn from the appropriate standard for their age.

BMI-for-age is only meaningful from age 2 onward, which is why this tool calculates and displays it starting at 24 months. For infants and toddlers under two, body mass index is not a reliable screening measure — their body proportions and rapid growth make the number misleading — so clinicians use weight-for-age and length instead. From age 2, BMI is computed as weight in kilograms divided by height in meters squared, then compared against age-and-sex BMI percentiles rather than the fixed adult cutoffs. That is also why the weight-status classification here switches over: it relies on weight-for-age below age 2 and BMI-for-age at 2 and older. Enter your child's age above and, once they reach two years, the chart automatically adds their BMI and BMI-for-age percentile to the results.

This tool follows the standard CDC weight-status categories, which are based on percentiles rather than raw numbers. A child below the 5th percentile is flagged Underweight, the 5th to 85th percentile is Healthy Weight, the 85th to 95th percentile is Overweight, and at or above the 95th percentile is Obese. For children aged 2 and older these bands are applied to BMI-for-age; for those under two, where BMI is not used, the classification falls back to the weight-for-age percentile. The result appears as a plain-language badge alongside the numbers. Remember that a single classification is a snapshot, not a diagnosis — a value near a boundary is a reason to ask a pediatrician questions, not a verdict. Enter age, sex, weight, and height above to see which category your child's measurements fall into.

Reference tables only list values at fixed age points, such as whole months or years, so a child who is 18 months or 7 years and 3 months would not match a row exactly. Rather than rounding to the nearest listed age, this tool uses linear interpolation: it takes the two nearest known age points and calculates a fitted curve between them, giving a percentile tuned to your child's precise age instead of a coarse approximation. That is why you enter age as years plus months together. Each measurement is then compared against seven reference markers — the 3rd, 10th, 25th, 50th, 75th, 90th, and 97th percentiles — so you can see exactly where the child lands between the standard curves. Enter an exact age above to get an interpolated, age-specific reading rather than a rounded one.