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Child Height Predictor

Estimate your child's potential adult height using the mid-parent formula - based on the heights of both parents.

Parents' Heights
About the Formula

How We Calculate

Mid-Parent Formula

Boys: (Father + Mother + 13cm) ÷ 2
Girls: (Father + Mother − 13cm) ÷ 2
The 13cm corrects for the average sex difference in adult height.

Genetics vs Nutrition

~80% of height is genetic. The remaining 20% is influenced by nutrition, sleep quality, physical activity and absence of chronic illness during childhood.

Growth Charts

For current height assessment, use WHO or IAP (Indian Academy of Pediatrics) growth charts based on your child's age and sex - not adult-height predictors.

Child Height Predictor - Adult Height Calculator

Predicting a child's adult height has fascinated parents and pediatricians for generations. The mid-parent height formula - the most widely validated method in clinical pediatrics - estimates a child's adult height by averaging both biological parents' heights and adding or subtracting an offset based on the child's sex: roughly +6.5 cm for boys and -6.5 cm for girls. This formula was developed through population studies and is used by pediatricians worldwide, including in India's National Health Mission child wellness programs.

Growth Patterns in India

Average adult height in India has been rising steadily. The average height for Indian men was approximately 165 cm in 2016 (Lancet study) compared to 161 cm in 1914, reflecting improved nutrition and healthcare over a century. The Indian Academy of Pediatrics (IAP) uses age-sex growth charts to monitor children's height velocity from birth through age 18. Genetic potential, nutrition - particularly protein and calcium intake - sleep, and physical activity all influence whether a child reaches their predicted height.

How to Use This Tool

Enter both parents' heights and select the child's biological sex to get an estimated adult height range. The prediction carries a margin of approximately plus or minus 5 cm, as genetics, health, and lifestyle all play a role. Parents concerned about their child's growth should consult a pediatric endocrinologist for a clinical evaluation involving bone age X-rays and growth velocity tracking.

FAQ

Frequently Asked Questions

The mid-parent formula predicts adult height within ±10 cm for approximately 68% of children. Formula: Boys = (Father + Mother + 13 cm) / 2; Girls = (Father + Mother − 13 cm) / 2. The ±10 cm range accounts for genetic variation, nutritional factors, and childhood health. It is a prediction range, not a guarantee.

Genetics accounts for approximately 80% of height variation. Key factors: adequate nutrition (protein, calcium, zinc, vitamin D); growth hormone and thyroid function; overall health; sleep quality (growth hormone peaks during deep sleep); physical activity. NFHS data shows ~35% of Indian children under 5 are stunted - significantly below their genetic height potential due to nutritional factors.

Girls typically reach final adult height by age 15–17 (usually within 2 years after their first period). Boys continue growing until age 17–21. Growth plates close permanently after puberty - once closed, no further height gain occurs. Boys peak growth spurt: approximately 13–15 years; girls: 11–13 years.

Nutrition can help a child reach their genetic potential but cannot exceed it. Key nutrients: Protein (milk, eggs, dal, chicken, paneer); Calcium (ragi, sesame seeds, green leafy vegetables); Vitamin D (sunlight, fortified milk); Zinc (meat, nuts, legumes). Adequate sleep (9–11 hours for school-age children) is equally critical as growth hormone peaks during deep sleep.
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