Compute BMI for children and an approximate healthy weight range.
BMI divides weight by the square of height in meters, then compares against broad bands, with a rough healthy weight range for the height. For children, percentile charts against age and sex are the gold standard, so treat this as a quick directional check, not a diagnosis.
Child BMI
BMI = weight(kg) / height(m) squared
BMI = weight(kg) / height(m) squared BMI divides weight by the square of height in meters, then compares against broad bands, with a rough healthy weight range for the height.
For children, percentile charts against age and sex are the gold standard, so treat this as a quick directional check, not a diagnosis.
This calculator takes 4 inputs: Weight, Height, Sex, Age. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.