Child Height Predictor

Predict Your Child's Adult Height

Enter your child's current measurements and parental heights to estimate their adult height.

Child's Current Height:

Child's Current Weight:

Child's Age:

years

Father's Height:

Mother's Height:

Child's Gender:

How to Predict a Child's Adult Height

Predicting a child's adult height involves considering genetic factors, current growth patterns, and gender-specific growth trends. While no prediction method is 100% accurate, the following approach provides a reasonable estimate based on available information.

The Height Prediction Formula

The basic formula for predicting adult height is:

For boys: $$Predicted Height = \frac{(Father's Height + Mother's Height)}{2} + 13 + Adjustment$$

For girls: $$Predicted Height = \frac{(Father's Height + Mother's Height)}{2} - 13 + Adjustment$$

Where:

Heights are in centimeters
The adjustment factor is based on the child's current height percentile

Calculation Steps

Calculate the mid-parent height
Apply the gender-specific formula
Calculate the child's current height percentile
Adjust the prediction based on the height percentile

Example Calculation

Let's predict the adult height for a boy with the following measurements:

Child's current height: 120 cm
Child's age: 8 years
Father's height: 180 cm
Mother's height: 165 cm

Step 1: Calculate mid-parent height

$$\begin{align} Mid\text{-}Parent Height &= \frac{Father's Height + Mother's Height}{2} \\ &= \frac{180 + 165}{2} \\ &= 172.5 \text{ cm} \end{align}$$

Step 2: Apply the gender-specific formula (for boys)

$$\begin{align} Initial Prediction &= Mid\text{-}Parent Height + 13 \\ &= 172.5 + 13 \\ &= 185.5 \text{ cm} \end{align}$$

Step 3: Calculate height percentile

$$\begin{align} Height Percentile &= \frac{Current Height - (Age \times 6.5 + 70)}{Age \times 0.7 + 10} \\ &= \frac{120 - (8 \times 6.5 + 70)}{8 \times 0.7 + 10} \\ &= \frac{120 - 122}{15.6} \\ &= -0.128 \end{align}$$

Step 4: Adjust prediction

$$\begin{align} Final Prediction &= Initial Prediction + (Height Percentile \times 2.54) \\ &= 185.5 + (-0.128 \times 2.54) \\ &= 185.5 - 0.325 \\ &= 185.175 \text{ cm} \end{align}$$

Therefore, the predicted adult height for this boy is approximately 185.2 cm.

Visual Representation

This bar chart compares the predicted height to the parents' heights and the average male height. It visually demonstrates where the predicted height falls in relation to these benchmarks, helping to interpret the calculated value.