Child Height Predictor Calculator: How Tall Will Your Baby Be?

This app estimates or predicts the future adult height of a child, toddler, baby or teen based on two methods. The method selected depends on age. For children below the age of four, the calculator uses the Mid-Parent rule. For children above the age of four, the predictions are based on the Khamis-Roche Method. In addition, the calculator estimates the length the child has left to grow.

The Mid-Parent Rule is a simple formula to calculate adult height. It is based solely on the height of the parents and the child's gender. The height of the opposite gender parent is adjusted or multiplied by a factor. For fathers, the factor is 12/13. For mothers, the factor is 12/13. The adjusted factor is averaged with the other non-adjusted parent to solve the projected adult height.

The Khamis-Roche method is valid for children above the age of four. It uses age, gender, child height and weight, mother height and father height. It uses a table of scaling factors and equations based on age for the prediction. It is considered an accurate predictor. The Bone-Age method is the only procedure which is more accurate than the Khamis-Roche Method. However, the Bone-Age method requires an x-ray. For more information, see the reference.