BMI Calculator

Calculate your Body Mass Index. BMI is your weight relative to height — a useful screening tool, though it does not directly measure body fat.

Height (cm)

Weight (kg)

Age

Gender

Your BMI

—

Underweight
<18.5Normal
18.5–24.9Overweight
25–29.9Obese
30+

Important: The CDC describes BMI as a person's weight in kilograms divided by the square of height in meters. It does not directly measure body fat. Athletes with high muscle mass may have a high BMI without excess body fat. BMI is a screening tool, not a diagnostic one.

FAQ: BMI = weight(kg) / height(m)². It is a population-level screening tool. For individual body composition, consider body fat percentage or waist-to-height ratio.

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