child / Height
Child height percentile calculator
One height measurement, placed among children of the same age and sex.
Against a reference
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The chosen standard’s LMS parameters turn the height into a z-score, then a percentile.
Step by step
Age in months comes from the birth date and the measurement date. The chosen standard supplies L, M and S for that month; Cole’s LMS formula turns the height into a z-score, and the normal distribution turns that into a percentile. Ages between two rows are interpolated rather than rounded to a whole month.
What this number cannot tell you
A single measurement describes this moment — not a trend, and not adult height. A low percentile is not a diagnosis and a high one is not a clean bill of health. It places one number among peers, and that is all it does.
An example
A boy of exactly 3 years measuring 96.5 cm falls at the 54th percentile on the WHO standard: about 54% of boys that age are shorter.
Common questions
- Why is there no number?
- There is no figure here that can be given with confidence, so none is given. The normal range for questions like this is wide anyway — a few minutes with a paediatrician or dentist usually settles it.
- What if my child’s age or country is not covered?
- It will say plainly that this age is not covered, rather than borrow figures from another age or another country. How far a standard reaches is set by whoever published it, and stretching it gives a placing that is simply wrong.
Next
The others in the same group.