Calculadora de Altura Esperada (crianças)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
alvo = (pai + mãe) / 2 ± 6,5 cm
About this calculator
The Expected Height Calculator for children estimates the adult height a child may reach based on parental heights. It uses the average of the father's and mother's heights, adjusted by ±6.5 cm according to the child's sex: add 6.5 cm for boys, subtract 6.5 cm for girls. This formula, known as the familial target height, provides a likely adult height range.
This tool is useful for pediatricians and families wanting a growth reference. For example, if the father is 180 cm and the mother 165 cm, the target height for a boy is (180+165)/2 + 6.5 = 179 cm, with a ±8.5 cm variation. For a girl, it would be (180+165)/2 - 6.5 = 166 cm. It helps detect early deviations from expected growth.
Keep in mind this is only a genetic estimate. Nutrition, overall health, sleep, and physical activity affect actual growth. The calculator does not replace medical evaluation, especially if the child is far outside the range or has growth issues. Consult a pediatric endocrinologist for a full assessment.
Frequently asked questions
Does the calculator work for children of any age?
Yes, the formula is based on parental heights, regardless of the child's age. However, it is more useful as a reference for final potential, not for predicting height at intermediate ages.
What does the ±6.5 cm value mean?
This value represents the standard deviation of the target height. The child's likely final height will be within a 13 cm range (6.5 cm above or below) around the calculated value, covering about 95% of cases.
Do I need the exact heights of the parents?
Ideally, use measured heights, but if not possible, family-reported values can be used. Remember that the accuracy of the result depends on the precision of these measurements.
Is the expected height guaranteed?
No. The genetic estimate is a reference, but factors such as nutrition, chronic diseases, hormones, and lifestyle can affect growth. Medical follow-up is essential.
Can I use it for adopted children?
Yes, as long as you have the biological parents' heights. Otherwise, the calculator is not applicable, as the calculation depends on the parents' genetics.