📊 BMI Calculator
Calculate your Body Mass Index and track trends over time. All data stays in your browser.
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Your BMI
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How It Works
BMI = weight (kg) / height (m)². It's a screening tool used by healthcare providers to identify weight categories.
- Underweight: BMI below 18.5
- Normal: BMI 18.5 to 24.9
- Overweight: BMI 25 to 29.9
- Obese: BMI 30 or higher
Note: BMI doesn't account for muscle mass, bone density, or body composition. Athletes may have a high BMI without excess fat.