Child Height Predictor
Enter parent heights and press
Predict Height
Height Prediction Results
Child Height Predictor Guide
The Mid-Parental Height (MPH) method is the most widely used medical formula to predict a child’s adult height. It was developed by paediatricians and is based on the fact that a child’s height is primarily determined by genetics — specifically, the average of both parents’ heights with a gender correction factor applied.
Father = 175 cm, Mother = 162 cm, Child = Boy:
Father’s Height
The biological father’s measured adult height in cm.
Mother’s Height
The biological mother’s measured adult height in cm.
±13 cm Factor
Added for boys (men are taller on average), subtracted for girls.
±5 cm Range
The prediction is accurate within ±5 cm for 85% of children.
Genetics (~80%)
The single biggest factor. Parental height accounts for roughly 80% of a child’s eventual adult stature.
Nutrition
Adequate protein, calcium, vitamin D, and zinc during childhood are essential for reaching genetic height potential.
Sleep & Hormones
Growth hormone is primarily secreted during deep sleep. 8–10 hours of quality sleep per night is crucial for children.
Physical Activity
Regular exercise stimulates growth hormone release and promotes healthy bone density during growth years.
Health Conditions
Chronic illnesses, hormonal disorders (e.g., growth hormone deficiency), or malabsorption can significantly affect growth.
Ethnicity & Region
Average heights vary significantly across populations. The formula gives a genetic estimate, not population-adjusted one.
Q1: How accurate is this height predictor?
The Mid-Parental Height method is accurate within ±5 cm for about 85% of children. It gives a genetic estimate and does not account for nutrition, health, or lifestyle factors.
Q2: When do boys and girls stop growing?
Girls typically reach their final adult height by age 16–17, whereas boys continue growing until 18–21. Girls also start their growth spurts earlier (around 10–14) than boys (12–16).
Q3: Can I increase my child’s predicted height?
You can help your child reach their genetic potential through good nutrition, adequate sleep (8–10 hrs), regular exercise, and treating any underlying health conditions promptly.
Q4: Is bone age important for height prediction?
Yes. A paediatrician may use an X-ray to assess bone age — if bone age is younger than chronological age, there may be more room to grow. This calculator does not account for bone age.