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Height: Expected average

Besides evaluating expected height on the growth charts (as explained above for calculating weight), we can also use the following formula for calculating height in children up till 12 years of age.

Average height (cm) for age (2 to 12 years) : [ Age(yr) x 6 ] + 77

Genetics and child height predictor

Child inherits stature representing genes from the parents. Correspondingly, the children follow their genetically determined height on the percentile growth curve throughout disease free childhood under the affectionate parenting. They grow to their adult height corresponding to that of their parents.

So here is the child's adult-height predictor depending on the average of the heights of the parents.

Mid parental height formula: Calculate expected adult height

For girls:
{ [ Father's height (in.) + Mother's height (in.) - 2.5} divide by 2

For boys:
{ [ Father's height (in.) + Mother's height (in.) + 2.5} divide by 2

Mid parental height calculation gives only an approximate expected adult height of a child in relation to that of the parents’.

Nevertheless, child height predictor formula is an important tool in hands of the pediatricians to evaluate a child with suspected growth disorder, but not without an appropriately maintained growth chart of the concerned child.