Enter once
Use the same age, sex, and measurements across relevant growth indicators and additional calculations.
Pediatric growth calculator app
WHO Z-scores and percentiles—without manual chart lookup.
Enter pediatric measurements, review validation checks, and see applicable WHO growth results in a structured iPhone and iPad workflow. Save profiles when you need to follow growth across visits.
Free to download · Optional in-app purchases · iPhone & iPad
Check before interpreting
Review warnings for unlikely measurements or possible unit-entry mistakes.
Keep the history
Save measurements locally and return to the patient's chart at the next visit.
What it calculates
One assessment, multiple pediatric growth indicators
The most useful indicator depends on the child's age, available measurements, and the question being considered. PediaMetrics applies the relevant WHO reference and displays the results that can be calculated from the information entered.
Weight-for-age
Places weight in relation to age using the applicable WHO reference.
Height or length-for-age
Places recumbent length or standing height in relation to age.
Weight-for-length or height
Relates weight to body length or height rather than to age alone.
BMI-for-age
Interprets calculated body mass index relative to age and sex.
Head-circumference-for-age
Provides an age-eligible head-circumference result where supported.
BMI, BSA, and fluids
Keeps body metrics and maintenance-fluid estimates beside the growth assessment.
More than a result
A calculator should help prevent avoidable interpretation errors.
The workflow gives measurement quality, the result, and the longitudinal context distinct roles.
Measurement checks
Age-based validation can flag an unlikely entry or a possible unit mistake before results are used.
Z-score, percentile, classification
See the numerical outputs and a structured classification together rather than translating a chart by hand.
Charts and patient history
Save measurements to review movement across visits instead of treating every calculation as isolated.
A safer input workflow
Catch a questionable value before it becomes a confident-looking result.
A misplaced decimal, the wrong unit, or an implausible measurement can make any calculated output misleading. PediaMetrics surfaces relevant checks and withholds unavailable results until the measurements are corrected.
These checks support review; they do not establish a diagnosis or replace repeat measurement and clinical judgment.
Start assessing pediatric growthCalculator FAQ
Common questions before downloading
Scope, standards, measurement history, and privacy.
What does the calculator calculate?
It calculates applicable WHO Z-scores, percentiles, and classifications for weight-for-age, height or length-for-age, weight-for-length or height, BMI-for-age, and head-circumference-for-age.
Does it check measurements first?
The app includes age-based checks that can flag unlikely values or possible unit-entry mistakes for review.
Can I chart more than one measurement?
Yes. Save patient profiles and measurement histories locally, then review eligible measurements on interactive growth charts.
Does it replace clinical judgment?
No. PediaMetrics is a support tool. Results must be interpreted in context and do not replace professional medical judgment, diagnosis, or treatment decisions.
Where is patient information stored?
Patient profiles and measurement history are stored locally on the user's device. No account is required.
From calculation to follow-up
Take WHO growth assessment with you on iPhone and iPad.
Calculate, validate, chart, save, and report within one focused pediatric growth workflow.