Weight-for-height is a clinical assessment used to evaluate a child or young person's weight relative to their height. It helps determine whether their weight is within the expected range for their height and age, based on reference data from large population studies.
This measure is particularly useful when height, rather than age, is the more reliable indicator of growth, such as in children with delayed or accelerated growth. It complements, but does not replace, other anthropometric measures such as BMI-for-age or weight-for-age.
This calculator uses UK-WHO growth chart data (RCPCH, 2011), derived from:
It calculates:
These results can help clinicians assess nutritional status, monitor progress, and identify possible underweight or overweight concerns.
I'm Rob Morgan, a UK software developer with over 20 years' experience building web applications.
Weight For Height was inspired by a conversation with my wife, a dietitian, who mentioned there wasn't a simple online tool for calculating UK weight-for-height centiles. My aim was to build a fast, accurate and freely available calculator that healthcare professionals could rely on.
If you have any feedback, suggestions or would like to discuss integrating the calculator into your own system, feel free to get in touch.
This tool is intended for use by healthcare professionals and those familiar with growth chart interpretation. It should not be used for self-diagnosis or treatment decisions.
While every effort has been made to ensure accuracy, the developer accepts no liability for clinical outcomes based on these calculations.