Length/height for age
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Measurement details
Do not enter a child's name, clinic number or contact details. Confirm dates, units and measurement position before calculating.
WHO screening reference
Weight for age
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BMI for age
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Do not diagnose from these numbers. A generic chart cannot determine malnutrition, obesity, failure to thrive, health or normal development. A clinician interprets measurement quality and the child's growth pattern, history and examination.
Measurement quality before interpretation
1
Use a calibrated infant or child scale, remove heavy clothing and record the unit shown.
2
Use recumbent length for children through 730 completed days and standing height from 731 days.
3
Repeat an unexpected measurement rather than changing units or dates until the result looks reassuring.
4
Bring the child's clinic growth record so a professional can assess the trend, not one point alone.
Questions people ask
What does a percentile mean?
It is the approximate percentage of the reference distribution below the calculated z-score. It is not a probability of illness, a grade, or a target the child must reach.
Why can a correct-looking result still need review?
One measurement can be affected by technique, equipment, illness or data entry. Growth assessment also depends on change over time and the child's clinical context.
What happens outside the supported age or table?
The page stops and shows no z-score. It does not extrapolate the under-five standard or substitute a different child or adolescent reference.
Does the page assess development?
No. Physical growth indicators do not establish whether development is normal. Discuss movement, communication, learning, behavior, feeding or regression concerns with a qualified child-health professional.