BMI Calculator

BMI (body mass index) is one of the most common and simple ways to assess the relationship between a person's body weight and height. This indicator is widely used in medicine, sports and health care to assess the degree of obesity or underweight in individuals.

You can find more calculators, such as the calorie calculator, body fat calculator, and macronutrients calculator, on Nutrition, Fitness and Health calculators page

Your BMI (Body Mass Index): Fill your weight and height to calculate

BMI is calculated by dividing body weight in kilograms by the square of height in meters. The formula looks like this:

BMI = weight (kg) / (height (m) * height (m))

For example, if a person weighs 70 kg and is 1.75 meters tall, the BMI calculation would be:

BMI = 70 / (1.75 * 1.75) ≈ 22.86

Once the BMI is calculated, the resulting value can be interpreted using the following categories:
  • BMI less than 16.5: Severely underweight
  • BMI 16.5 to 18.5: Underweight
  • BMI 18.5 to 24.9: Normal weight
  • BMI 25.0 to 29.9: Overweight
  • BMI from 30.0 to 34.9: Obesity grade I
  • BMI between 35.0 and 39.9: Obesity grade II
  • BMI over 40.0: Obesity grade III (extremely high health risk)

It is important to note that BMI is not a perfect indicator of health and does not take into account individual differences in body composition such as muscle mass and body fat percentage. For example, an athlete with a lot of muscle and low body fat may have a high BMI, which is not indicative of obesity.

However, BMI remains a useful tool for assessing health at the population level and can serve as a starting point for more comprehensive medical and physical assessments. When evaluating your weight and health, it is always a good idea to consult with your doctor or a nutrition and physical activity specialist for a more accurate assessment and recommendations.