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What Is BMI?

Body Mass Index (BMI) is a measure of body size based on height and weight. WHO defines a healthy BMI as 18.5–24.9. Values below 18.5 indicate underweight; 25–29.9 is overweight; 30 and above is obese.

What Is Ideal Weight?

Ideal weight is the weight range that corresponds to a BMI of 18.5–24.9 for your height. This tool calculates your personal range using the Hamwi formula and the healthy BMI boundaries.

Body Fat Estimation

Body fat percentage is estimated using the Deurenberg formula: BF% = (1.20 × BMI) + (0.23 × Age) − (10.8 × sex) − 5.4. This is an estimate; clinical methods are more precise.