Category
Body metrics
BMI, ideal weight, and body composition estimates.
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Guides
Longer reads that link back to the tools.
What Is BMI? Body Mass Index Explained
Learn how body mass index is calculated, what WHO categories mean, and when BMI is a useful screening tool versus a misleading number.
BMI Categories and Limitations
Understand the full range of WHO BMI categories, obesity classes, population-specific cutoffs, and alternative metrics when BMI alone is not enough.