See the mismatch between BMI and body fat. The old shortcut vs. the real picture. All data stays in your browser.
This analyzer compares your BMI (Body Mass Index) against your body fat percentage side-by-side. BMI only uses height and weight — it cannot see muscle vs. fat. This creates two common misclassifications: BMI false positives (muscular people labeled "overweight") and normal weight obesity (BMI normal but body fat too high). The tool flags these mismatches automatically and shows you which metric to trust. The visualization bar compares your values against population categories.
Tip: If you are athletic or muscular, always prioritize body fat percentage over BMI. If you are sedentary, BMI is a rough screening tool but still misses normal weight obesity.
Track how your BMI and body fat change over time. Stored locally.
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BMI only uses height and weight. It cannot distinguish muscle from fat. A muscular athlete may have a BMI over 25 ("overweight") while having 10% body fat.
It is when your BMI is in the "normal" range (18.5-25) but your body fat percentage is too high. Up to 30% of adults may have this condition.
If you are athletic or muscular, always prioritize body fat percentage. If sedentary, BMI is a rough screening tool but still misses normal weight obesity.
Choose based on your weekly structured exercise: Sedentary (0 days), Light (1-2), Moderate (3-4), Active (5-6), Very Active (competitive training).