WHO Growth Chart Calculator

1 What is the WHO Growth Chart Calculator?

The WHO Growth Chart Calculator lets clinicians plot a child's measurements against the WHO Child Growth Standards 2006 for children aged 0–5 years, with separate charts for boys and girls. It covers weight-for-age, length/height-for-age, head-circumference-for-age, and BMI-for-age (all 0–5 years), plus weight-for-length (0–2 years) and weight-for-height (2–5 years). The screen is a selection hub that routes to a dedicated chart-plotting view for whichever parameter and sex is chosen.

2 When to use it

Assessing a child's growth trajectory against WHO international standards from birth to age 5
Screening for undernutrition or overnutrition using weight-for-length/height or BMI-for-age
Monitoring head circumference growth for signs of micro- or macrocephaly
Tracking longitudinal growth (weight, length/height) at routine well-child visits
Comparing growth parameters against sex-specific WHO percentile curves

3 Formula & method

The screen offers six chart types per sex — Weight for Age, Length/Height for Age, Head Circumference, and BMI for Age (each 0–5 years), plus Weight for Length (0–2 years) and Weight for Height (2–5 years) — and hands off to a chart screen that plots the child's data against WHO percentile/z-score curves. The app displays the citation "WHO Child Growth Standards 2006" on the chart selection screen, and the underlying chart screen repeats "WHO Child Growth Standards 2006" / "WHO Growth Standards 2006" on its plotted views and PDF export.

WHO Child Growth Standards 2006

4 Frequently asked questions

What age range do the WHO charts in the app cover?

0–5 years for weight-for-age, length/height-for-age, head circumference, and BMI-for-age; weight-for-length is scoped to 0–2 years and weight-for-height to 2–5 years.

What growth standard is this based on?

The app labels it "WHO Child Growth Standards 2006" on both the chart selection screen and the plotted chart views.

Are the charts different for boys and girls?

Yes — the selection screen has separate boys and girls sections, each offering the same six chart types.

Which chart should I use for a 4-month-old's weight relative to length?

Weight for Length, which the app scopes to 0–2 years.

Does the app support BMI tracking for young children?

Yes, BMI for Age is offered for children 0–5 years.

5 Related tools

For qualified clinicians. This page and the PediAid app are a clinical aid only. Calculations and reference data must be verified against the patient's clinical context, the source guideline and your local protocols before any treatment decision is made.