What is BMI?
Body Mass Index (BMI) is a simple calculation using height and weight to estimate body fat. The formula is: BMI = weight (kg) / height (m)². It provides a quick screening tool used by healthcare professionals worldwide.
BMI Categories
- Underweight: Below 18.5
- Normal weight: 18.5 - 24.9
- Overweight: 25 - 29.9
- Obese: 30 and above
Limitations of BMI
- Doesn't Distinguish Muscle from Fat: Athletes may have "overweight" BMIs despite low body fat
- Age and Sex Variations: BMI doesn't account for body composition changes
- Fat Distribution: Where you carry fat matters more than total amount
Better Health Indicators
- Waist circumference: Direct measure of abdominal fat
- Body fat percentage: More accurate body composition measure
- Blood pressure, cholesterol: Direct health markers
Conclusion
BMI is a useful screening tool but has important limitations. Use our free BMI calculator for instant results with category explanations.
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