Growth Chart Calculator

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Height-for-age calculator

Height-for-age (length-for-age for infants under 24 months) is one of the most stable growth indicators — it moves slowly and reflects long-term nutrition and genetic potential. It's what pediatricians track to screen for stunting, short stature, and growth failure.

This calculator only asks for length/height. Measurement convention switches at 24 months (supine length becomes standing stature); the calculator picks the correct reference automatically when the Standard is set to "Auto".

Frequently asked questions

What's the difference between length and stature?

Length is measured lying down (supine); stature is measured standing. Convention switches at 24 months — under 24 months we measure length, from 24 months onward we measure stature (height). The same child measured both ways differs by roughly 0.5–1 cm.

What does 'height-for-age' tell me?

Height-for-age reflects long-term nutritional status and genetic growth potential. Short height-for-age (low percentile) that tracks over time is called 'stunting' when it's nutritional, or 'short stature' more broadly. Height-for-age is less volatile than weight-for-age and is a strong indicator of overall child health.

Is height strongly inherited?

Yes — adult height is roughly 80% heritable. Mid-parental height predicts adult height within about ±8 cm. Environment (especially early nutrition) determines how close a child gets to their genetic ceiling.