BMI Calculator

Body Mass Index (BMI) is a numerical value calculated by dividing your weight in kilograms by the square of your height in meters (kg/m²). It is a widely used screening tool to categorize individuals into weight categories such as underweight, normal weight, overweight, and obese.

The standard BMI categories are: Underweight (below 18.5), Normal weight (18.5 to 24.9), Overweight (25 to 29.9), Obese Class I (30 to 34.9), Obese Class II (35 to 39.9), and Obese Class III (40 and above). These ranges are established by the World Health Organization.

BMI does not distinguish between muscle mass and fat mass, so muscular individuals may have a high BMI despite being healthy. It also does not account for age, sex, ethnicity, or body fat distribution. For example, abdominal fat carries greater health risks than fat stored elsewhere, but BMI cannot measure this distinction.

A healthy weight range corresponds to a BMI between 18.5 and 24.9. The exact weight range depends on your height. For example, for someone who is 170 cm tall, the healthy weight range is approximately 53.5 to 72.0 kg. This calculator shows your personalized healthy weight range based on your height.

BMI can be misleading for athletes, bodybuilders, and highly muscular individuals because muscle weighs more than fat. These individuals may be classified as overweight or obese by BMI despite having low body fat percentages. Alternative measures like body fat percentage, waist circumference, or DEXA scans provide more accurate assessments for such individuals.