Enter the height and weight of the child, along with the height of the same-sex parent into the calculator to determine the estimated adult height using the Khamis-Roche Method.

What is a The Khamis-Roche Method?

The Khamis-Roche Method is a mathematical formula used to predict the future height of a child based on the current height, weight, and age of the child, as well as the height of the parents. Developed by Dr. Harry Khamis and Dr. Alex Roche, this method is considered to be one of the most accurate ways to predict adult height, especially when the child is five years or older. It takes into account the natural growth patterns of children and the genetic influence of parents’ height.

How to Calculate The Khamis-Roche Method?

The following steps outline how to calculate the estimated adult height using The Khamis-Roche Method:

  1. First, determine the height of the child (cm).
  2. Next, determine the mother’s height (cm).
  3. Next, determine the father’s height (cm).
  4. Next, determine the weight of the child (kg).
  5. Next, calculate the estimated adult height using the formula:
    • For boys: H = 52.5 + 0.593 * (height of child + mother’s height) + 0.142 * (weight of child) – 0.00022 * (weight of child)^2 – 0.00013 * (height of child + mother’s height)^2
    • For girls: H = 42.1 + 0.579 * (height of child + father’s height) + 0.161 * (weight of child) – 0.00018 * (weight of child)^2 – 0.00013 * (height of child + father’s height)^2
  6. Finally, calculate the estimated adult height (H).
  7. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge:

Height of child (cm) = 150

Mother’s height (cm) = 165

Father’s height (cm) = 180

Weight of child (kg) = 40