BMI Prime & Ponderal Index
How far your BMI sits from the upper healthy limit of 25.
Your result
BMI Prime of 1.0 equals a BMI of 25. Values from 0.74 to 0.99 fall in the healthy band.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the BMI Prime & Ponderal Index do?
How far your BMI sits from the upper healthy limit of 25. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how much weight to lose; weight to reach bmi 25; ponderal index.