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SHOP HK VITALSBMI (Body Mass Index) is a simple screening measure that estimates whether your weight is healthy for your height, calculated as weight in kilograms divided by height in meters squared. It's widely used because it's quick and requires no special equipment, but it doesn't distinguish between muscle mass and fat mass โ so a very muscular person may show a 'high' BMI despite having low body fat.
The standard categories are: below 18.5 is underweight, 18.5-24.9 is normal weight, 25-29.9 is overweight, and 30+ is obese. These thresholds are based on general population studies and may not perfectly apply to athletes, elderly individuals, or certain ethnic groups where research suggests slightly different healthy ranges.
No โ BMI doesn't account for muscle mass, bone density, or body composition. Athletes and very muscular individuals often show a higher BMI despite being lean and healthy. It's a useful general screening tool but not a precise diagnosis of health.
Generally, 18.5 to 24.9 is considered the normal/healthy range for most adults, though some research suggests slightly different optimal ranges for older adults and different ethnic populations.
Body fat percentage (see the Body Fat % Calculator on KiTools) gives a more accurate picture of your actual composition, especially if you exercise regularly. BMI is faster to calculate and useful as a first check, but body fat % is more informative for fitness tracking.