BMI Formula:
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BMI is a simple index of weight-for-height that is commonly used to classify underweight, normal weight, overweight and obesity in adults. It provides a rough estimate of body fat and health risks associated with weight.
The calculator uses the standard BMI formula:
Where:
Explanation: BMI is calculated by dividing weight in kilograms by the square of height in meters.
Details: BMI is a quick screening tool to identify potential weight problems in adults. It helps assess risk for diseases associated with overweight and obesity.
Tips: Enter weight in kilograms and height in meters. All values must be valid (weight > 0, height > 0).
Q1: What are the standard BMI categories?
A: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), Obesity (≥30).
Q2: Is BMI accurate for everyone?
A: BMI may overestimate body fat in muscular individuals and underestimate it in older people with lost muscle mass.
Q3: Can BMI be used for children?
A: No, children need age- and sex-specific BMI percentiles rather than adult categories.
Q4: What are limitations of BMI?
A: Doesn't distinguish between muscle and fat, doesn't account for fat distribution, and may vary by ethnicity.
Q5: What's a healthy BMI range?
A: For most adults, 18.5 to 24.9 is considered healthy, but individual health factors should also be considered.