BMI Calculator

BMI is your weight (kg) divided by the square of your height (m). For example, at 170cm and 65kg, it's 65 ÷ (1.7 × 1.7) ≈ 22.5.

Below 18.5 is underweight, 18.5–23 is normal, 23–25 is overweight, 25–30 is Obese I, 30–35 is Obese II, and 35 and above is severely obese.

BMI is a simple reference metric based only on height and weight, so it doesn't account for muscle mass or body fat percentage. Someone with high muscle mass can have a high BMI but low body fat, so use it only as a general guide.

No. All calculations happen entirely in your browser and are never sent to or stored on a server.

It's your height (m) squared, multiplied by BMI values 18.5 and 22.9. Falling within that range means a normal BMI.