Height Calculator

To estimate future adult height:

Step 1: Choose whether the estimate is for a boy or girl.

Step 2: Enter mother's and father's heights in centimeters.

Step 3: Click 'Calculate Predicted Height' to view: - Predicted adult height - Mid-parental baseline - Expected range around the estimate - Genetics vs environment contribution reference

Use this as a guidance tool, not a diagnosis. Growth tracking over time with pediatric follow-up remains essential when concerns exist.

This calculator uses the mid-parental height formula:

1. Mid-parental height = (mother's height + father's height) / 2

2. Predicted adult height: - Boy = mid-parental + 6.5 cm - Girl = mid-parental - 6.5 cm

3. Practical prediction spread: - Approximate range = predicted height ±10 cm (about ±4 inches)

The formula gives a fast estimate grounded in family stature, while still acknowledging normal biological variation.

Height is influenced mostly by inherited biology, but development conditions still matter. Research summaries commonly estimate that around 60-80% of height variation is genetic, with roughly 20-40% tied to environmental factors.

Key non-genetic influences include long-term nutrition, endocrine status (such as growth and thyroid hormones), chronic illness burden, and certain medications. In other words, genetics may define a likely ceiling, but health and environment help determine whether that potential is reached.

This calculator uses a non-invasive parental-height method for convenience. More advanced approaches exist for clinical settings, but they require additional measurements and are not always necessary for routine family estimates.