1. What is the Height Prediction Formula?

The height prediction formula estimates a son's adult height based on the heights of both parents. This method provides a rough estimate of potential adult height, though genetic and environmental factors can influence the actual outcome.

2. How Does the Calculator Work?

The calculator uses the height prediction formula:

Where:

• Father's Height — Height of the father in inches
• Mother's Height — Height of the mother in inches
• 5 — Adjustment factor for male children

Explanation: The formula averages the parents' heights with an additional 5 inches (to account for typical male height advantage) to estimate the son's adult height.

3. Accuracy of Height Prediction

Details: This method predicts height within about 2 inches for 68% of children and within about 4 inches for 95% of children. Nutrition, health, and other genetic factors can affect actual height.

4. Using the Calculator

Tips: Enter both parents' heights in inches. For most accurate results, use the parents' adult heights (not their childhood heights).

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this prediction?
A: The prediction is accurate to within ±2 inches about two-thirds of the time. Many factors beyond genetics influence final height.

Q2: Can this be used for daughters?
A: For daughters, use the same formula but subtract 5 inches instead of adding (or use a dedicated daughter height calculator).

Q3: What if I only know heights in centimeters?
A: Convert cm to inches by dividing by 2.54 (1 inch = 2.54 cm) before using the calculator.

Q4: Does this work for adopted children?
A: Only if the biological parents' heights are known. The prediction relies on genetic inheritance.

Q5: When can you reliably predict a child's height?
A: Height predictions become more reliable after age 2, though final height can still vary by several inches from predictions.