BMI Calculator

Calculate your Body Mass Index (BMI) and find out if your weight is in a healthy range. BMI is a widely accepted measure for assessing body weight relative to height.

Calculate Your BMI
Enter your weight and height to calculate your body mass index.
BMI Scale According to WHO Standards
Body mass index categories according to the World Health Organization.
< 18.5
Underweight
18.5 - 24.9
Normal Weight
25 - 29.9
Overweight
>= 30
Obesity

What is BMI and How is it Calculated?

Body Mass Index (BMI) is a simple numerical measure that uses your weight and height to estimate whether you are underweight, normal weight, overweight, or obese. The formula for calculating BMI is: BMI = weight (kg) / height squared (m squared).

BMI was introduced by Belgian mathematician Adolphe Quetelet in the 19th century, and today it is used by health organizations worldwide as a quick way to assess body weight. You can find more about the standards on the official World Health Organization website.

Limitations of the BMI Calculator

While BMI is a useful screening tool, it has certain limitations. It does not differentiate between muscle mass and fat tissue, meaning athletes with high muscle mass may have a high BMI even though they are not obese. It also does not take into account body fat distribution or factors such as age and ethnicity.

For a more complete picture of your health, consider using other measures such as waist circumference, waist-to-hip ratio, or body fat percentage. Check out our other health calculators for additional information.

How to Achieve a Healthy Body Weight

Maintaining a healthy body weight involves a balanced diet rich in fruits, vegetables, whole grains, and proteins, along with regular physical activity. At least 150 minutes of moderate aerobic activity per week is recommended.