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Standard BMI Calculator
The NHLBI BMI calculator estimates adult body mass index from height and weight and explains its limits as a health measure.
About Standard BMI Calculator
The Standard BMI Calculator, published by the National Heart, Lung, and Blood Institute (NHLBI) at the National Institutes of Health (NIH), estimates body mass index for adults from height and weight. The page explains that BMI is a measure of body fat based on height and weight and applies to adult men and women.
The page also states its limits. BMI does not take into account muscle mass, bone density, or body composition, so the result is only one part of a health picture. The page notes that a healthcare provider will consider whether a BMI is too high or too low for an individual.
Key features
- Calculates adult body mass index from entered height and weight
- Shows the calculated BMI alongside the underweight, healthy, overweight, and obesity ranges
- Displays a table of BMI category ranges
- Links to related health topics such as healthy weight, diet, and physical activity
Best for: Adults who want a quick BMI estimate along with an explanation of what the measure does and does not account for.
Good for
- Presents the BMI category ranges in a clear table next to the result
- States the limits of BMI as a health measure on the same page
Watch out for
- BMI does not account for muscle mass, bone density, or body composition
- Applies to adults only
Standard BMI Calculator at a glance
- Category
- Health & Fitness › Health & Fitness Resources
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Standard BMI Calculator FAQ
Who is the BMI calculation intended for?
The page states that BMI applies to adult men and women.
What does BMI not take into account?
The page says BMI is based only on height and weight and does not take into account muscle mass, bone density, or body composition.
Who should interpret a BMI result?
The page says a healthcare provider will consider whether a BMI is too high or too low for the individual.
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