Health & Fitness
Height Calculator
Calculate and predict height based on various factors including parental height and current measurements.
Reviewed by the calculator.uk.com Team · Last reviewed 21 June 2026 · Our methodology
Enter values to see height prediction
Related to Height Calculator
The Height Calculator uses a combination of genetic factors and growth patterns to predict adult height. It primarily relies on two key methods: the Mid-Parental Height Method and the Current Height Projection Method. These calculations take into account gender differences, current age and height, and parental heights to provide a comprehensive height prediction.
Mid-Parental Height Method
This method calculates the genetic height potential based on parents' heights. For boys, we add 13 cm to the mother's height before averaging with the father's height. For girls, we subtract 13 cm from the father's height before averaging with the mother's height. This accounts for the natural height difference between genders.
Current Height Projection
This method considers the child's current height and age, estimating remaining growth potential until adulthood. The calculator assumes an average growth rate and adjusts predictions based on the mid-parental height to provide a more accurate estimate.
The calculator provides three key pieces of information: predicted adult height, height range, and mid-parental height. Understanding these values helps you interpret the results accurately and set realistic expectations for growth potential.
Predicted Adult Height
This is the estimated final adult height based on current measurements and genetic factors. The prediction becomes more accurate as the child gets closer to puberty, typically around ages 11-13 for girls and 13-15 for boys.
Height Range
The height range accounts for natural variation in growth patterns, showing a range of ±5.08 cm (±2 inches) from the predicted height. Most individuals will reach their final adult height within this range.
1. When is the best time to use this calculator?
The calculator is most accurate when used during childhood and early adolescence, specifically between ages 2 and 20. The predictions become more reliable as children approach puberty, as growth patterns become more established.
2. How accurate is the height prediction?
The prediction accuracy varies depending on several factors, including age at measurement and consistency of growth patterns. The calculator typically provides predictions within ±5.08 cm (2 inches) of the actual adult height, with accuracy improving as the child gets closer to their final height.
3. What factors can affect final adult height?
Several factors can influence final adult height beyond genetics, including nutrition, overall health, physical activity, sleep patterns, and medical conditions. Environmental factors and lifestyle choices during growth years can also impact height development.
4. Can the predicted height change over time?
Yes, predictions may vary when calculated at different ages. Growth patterns can change during development, especially during puberty. Regular monitoring and updates to the calculation can provide more accurate predictions as a child grows.
5. What is the scientific source for this calculator?
The mid-parental height component uses the standard clinical formula for estimating a child's genetic height potential: adding or subtracting 13 cm to average the parents' heights by sex, a method commonly used alongside growth charts such as those published by the RCPCH and CDC. The current-height growth projection and the ±5.08 cm (2 inch) range applied here are simplified estimates built into this tool rather than figures drawn from a specific clinical study, so treat the prediction as a rough guide rather than a diagnostic growth assessment.