Question 1

What is BMI?

Accepted Answer

BMI (Body Mass Index) is a measure of body fat based on height and weight. It is calculated by dividing weight in kilograms by height in meters squared (kg/m²). BMI is used as a screening tool, not a diagnostic measure.

Question 2

What is a healthy BMI range?

Accepted Answer

According to the WHO: Underweight is below 18.5, Normal weight is 18.5–24.9, Overweight is 25.0–29.9, and Obese is 30.0 and above. These thresholds may vary slightly for different ethnic groups.

Question 3

Is BMI an accurate measure of health?

Accepted Answer

BMI is a useful screening tool but has limitations. It does not measure body fat percentage directly and can misclassify muscular individuals as overweight. It should be used alongside other health metrics, not in isolation.

Question 4

How do I calculate BMI manually?

Accepted Answer

Metric: BMI = weight(kg) / height(m)². Imperial: BMI = (weight(lbs) / height(inches)²) × 703. For example, a person who is 70kg and 1.75m tall has a BMI of 70 / (1.75²) = 22.9.

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