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BMI Formula:
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Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight and obesity in adults. It is defined as a person's weight in kilograms divided by the square of their height in meters (kg/m²).
The calculator uses the BMI formula:
Where:
Explanation: BMI provides a simple numeric measure of a person's thickness or thinness, allowing health professionals to discuss weight problems more objectively with their patients.
Details: BMI calculation is important for weight loss tracking as it helps identify whether an individual is underweight, normal weight, overweight, or obese. This classification helps in setting appropriate weight management goals and monitoring progress.
Tips: Enter weight in kilograms and height in meters. All values must be valid (weight > 0, height > 0). For accurate results, measure your weight and height without shoes and heavy clothing.
Q1: What is a healthy BMI range?
A: For adults, a BMI between 18.5 and 24.9 is considered healthy. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is obese.
Q2: Can BMI be used for everyone?
A: BMI may not be accurate for athletes with high muscle mass, pregnant women, children, and the elderly. Other measurements may be needed for these populations.
Q3: How often should I calculate my BMI for weight loss tracking?
A: For weight loss tracking, calculating BMI once a month is sufficient as significant changes in BMI take time to manifest.
Q4: Does BMI indicate body fat percentage?
A: BMI is correlated with body fat percentage but doesn't directly measure it. Other methods like skinfold measurements or bioelectrical impedance may provide more accurate body fat assessment.
Q5: Should BMI be the only measurement for weight loss progress?
A: No, it's best to combine BMI with other measurements like waist circumference, body fat percentage, and overall fitness improvements for a comprehensive view of health progress.