CDC growth chart calculator
The CDC growth charts are the reference standard for US children aged 2 years and older. They
describe how a nationally representative sample of children grew between the 1960s and 1990s
and are what most American pediatric clinics use past the second birthday.
Enter birth date, measurement date, sex, and weight and/or stature below. The calculator
plots the measurement against the 3rd through 97th percentile bands and returns the exact
percentile via the LMS method. The calculator opens with CDC pre-selected — switch to
WHO via the Standard dropdown (or the dedicated page)
for 0–24 months, where WHO's prescriptive standards are recommended.
Frequently asked questions
When should I use CDC growth charts instead of WHO?
In the United States, the CDC growth charts are the standard for children aged 2 years and older. Most pediatric clinics use WHO from birth to 24 months, then switch to CDC for weight-for-age and stature-for-age from 2–20 years, and CDC BMI-for-age from 2+ years.
What age range do CDC charts cover?
The CDC growth charts used here cover 0–240 months (0–20 years) for weight-for-age, stature-for-age, and weight-for-length/stature. They were originally published in 2000 and are derived from NHANES survey data representing the US population.
Are CDC charts descriptive or prescriptive?
CDC charts are descriptive — they describe how US children actually grew in the 1960s–1990s. WHO charts are prescriptive — they describe how children should grow under optimal conditions. This is why WHO and CDC give slightly different percentiles, especially below 24 months.
What measurements does the CDC calculator support?
Weight-for-age (0–240 months) and length-for-age (0–24 months, lying) / stature-for-age (24+ months, standing). BMI-for-age support is planned for a future update.