Predict Adult Height
Use the mid-parental height method to estimate a child’s likely adult height range.
Note: This estimate is statistical and not a diagnosis. Individual growth varies due to nutrition, sleep, hormones, health conditions, and puberty timing.
How this height prediction works
This calculator uses the mid-parental height formula, one of the most commonly used screening tools for estimating a child’s likely adult height. It starts with the parents’ heights, then adjusts for sex.
- For boys: (Father height + Mother height + 13 cm) ÷ 2
- For girls: (Father height + Mother height − 13 cm) ÷ 2
The result is a target height, and most children fall within a range around that target.
How to use the calculator
Step 1: Choose your unit system
Select metric (centimeters) or imperial (feet and inches).
Step 2: Enter both parents’ heights
Use realistic measured values whenever possible, ideally without shoes.
Step 3: Select the child’s sex
The formula uses different adjustments for male and female growth patterns.
Step 4: Review target and predicted range
You’ll get a target adult height and a likely range, shown in both centimeters and feet/inches.
How accurate is a predicted height?
This method is useful for a general estimate, but no calculator can perfectly predict final adult height. A common interpretation is that many children end up within roughly ±8.5 cm (about ±3.3 inches) of their target height.
Factors that influence final adult height
- Genetics: The strongest contributor.
- Nutrition: Adequate calories, protein, calcium, and micronutrients support growth.
- Sleep: Growth hormone release is closely tied to sleep quality.
- Physical activity: Supports bone and muscle development.
- Health conditions: Chronic illness or endocrine disorders may affect growth.
- Puberty timing: Early or late puberty can shift growth patterns.
Frequently asked questions
Can stretching exercises make you permanently taller?
Stretching can improve posture and help you stand at your full current height, but it does not usually increase skeletal adult height permanently.
Can this be used for toddlers and teens?
Yes, as a rough estimate. However, growth velocity changes throughout childhood and adolescence, so predictions should be interpreted cautiously, especially during puberty.
When should I see a doctor about growth concerns?
If a child’s growth curve drops significantly, if puberty appears very early or very late, or if height is far outside expected family patterns, consult a pediatrician or pediatric endocrinologist.
Healthy growth checklist
- Balanced meals with enough protein, iron, vitamin D, and calcium
- Consistent sleep schedule appropriate for age
- Regular physical activity and outdoor time
- Routine pediatric checkups and growth tracking
- Prompt attention to chronic health issues
Bottom line
A height predictor is best used as a planning and educational tool—not a guarantee. Your result gives a realistic ballpark estimate, while real-life growth depends on genetics plus health and environment.