How it works
Estimate a child’s adult height based on the mid-parental height method.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
3-
?fatherHeight=Father's Height (cm)Number · Optional · Default: 178
-
?motherHeight=Mother's Height (cm)Number · Optional · Default: 165
-
?gender=GenderChoice · Optional · Default: male
Outputs
1-
resultResultText · Primary output
result contains the calculator’s complete rendered result area, including its visible result cards, tables, charts, and messages.
Predict a child’s adult height based on their parents’ heights
Description
The Height Calculator is a pediatric tool used to estimate the future adult height of a child. While many factors like nutrition and health play a role, genetics are the primary driver of height. This tool uses the Mid-Parental Height method, a standard calculation used by clinicians to provide a rough baseline for a child’s growth potential.
Inputs
- Gender: Select the child’s biological gender (Boy or Girl).
- Father’s Height (cm): The father’s adult height.
- Mother’s Height (cm): The mother’s adult height.
Outputs
- Predicted Adult Height: The estimated height in centimeters when the child reaches maturity.
Chart
- N/A: This tool provides a direct numeric growth prediction.
“Good to Know”
- The Formula:
- Boys: $\frac{(\text{Father} + \text{Mother} + 13)}{2}$
- Girls: $\frac{(\text{Father} + \text{Mother} - 13)}{2}$
- Accuracy: This is a statistical estimate. Most children will fall within $\pm 5\text{ cm}$ of this prediction, but individual variations are common.
- Growth Spurts: Children grow at different rates; this tool predicts the final outcome, not the current growth trajectory.
Examples
Example 1: Tall Parents (Boy)
- Input: Boy, Father: 190 cm, Mother: 175 cm
- Output: 189.0 cm
Example 2: Average Parents (Girl)
- Input: Girl, Father: 178 cm, Mother: 165 cm
- Output: 165.0 cm
Example 3: Mixed Height (Boy)
- Input: Boy, Father: 170 cm, Mother: 170 cm
- Output: 176.5 cm