Child Height Predictor
Predict your child's adult height using the mid-parental height method based on both parents' heights.
Used to show current vs predicted height
Enter current height in centimetres to see growth remaining
How to Use
1. Select your child's gender — boys and girls have different mid-parental height adjustments. 2. Choose father's height and mother's height from the dropdowns. 3. Optionally enter your child's current age and height to see how much growth may be remaining.How the mid-parental height method works: This is the standard clinical method used by paediatricians. It averages both parents' heights and applies a gender-based correction of ±6.5 cm. The result has a standard deviation of ±8.5 cm, meaning most children fall within that range of the prediction.
Important: This is a statistical prediction, not a guarantee. Factors like nutrition, sleep quality, chronic illness, and hormonal health can significantly influence final adult height.
Formula
Boy: Predicted height = (Father's height + Mother's height + 13) ÷ 2
Girl: Predicted height = (Father's height + Mother's height − 13) ÷ 2
Range: Predicted height ± 8.5 cmFrequently Asked Questions
How accurate is the child height predictor?
The mid-parental height method is the most widely used clinical estimate and is reasonably accurate for populations. However, it has a standard deviation of ±8.5 cm, meaning roughly 68% of children fall within that range of the prediction. About 95% fall within ±17 cm. It works best for children with no underlying growth disorders. If you're concerned about your child's growth, a paediatrician can order a bone age X-ray for a more precise prediction.
When do children stop growing?
Girls typically stop growing 1–2 years after their first period, usually around 14–16 years of age. Boys continue growing until around 17–18 years, though some grow into their early 20s. Growth plates in the bones fuse at the end of puberty, which marks the end of height gain. A bone age scan can confirm whether growth plates are still open.
Does nutrition affect how tall my child will grow?
Yes — significantly. Genetics sets the upper limit of potential height, but adequate nutrition is required to reach it. Protein, calcium, vitamin D, zinc, and overall caloric sufficiency are all important. Children who experience chronic malnutrition or illness during key growth periods may not reach their genetic potential. Conversely, well-nourished children in developed countries today often grow slightly taller than their parents due to improved nutrition.
Related Calculators
Pregnancy Due Date
Calculate your estimated due date, current week of pregnancy, and key milestone dates.
Open Toolarrow_forwardPostpartum Recovery Timeline
Get a week-by-week postpartum recovery milestone guide based on your birth type and recovery progress.
Open Toolarrow_forwardChildcare Cost (CCS)
Calculate your weekly childcare cost after the Child Care Subsidy (CCS) based on your income and hours of care.
Open Toolarrow_forward