percentile / Weight
Child weight percentile calculator
One weight measurement, placed among children of the same age and sex.
Compared with peers
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The chosen standard’s LMS parameters turn the weight into a z-score, then a percentile.
Step by step
The same arithmetic as the height page, but coverage is checked separately: a standard having a height table does not mean it has a weight table, and the upper age limit is often different. What can be answered here is decided by the weight table’s own range.
What this number cannot tell you
Weight alone says less as a child gets older. The same 30 kg means something quite different for a tall child and a short one, which is why weight percentile on its own stops being the right question around age ten — BMI is. This number is not advice to gain or lose anything.
An example
A boy of exactly 3 years weighing 14.8 kg falls at the 60th percentile on the WHO standard.
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.