BMI Calculator

BMI 173 cm, weight 119

Don't worry about weight, we'll tell you immediatly if 173cm is healthy

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Graph your BMI against the healthy norm

Health dangers due to obesity

These risks are associated with overweight and obese adults

Adults whose BMI is larger than 25 (overweight) or whose BMI is over than 30 (obese) have an elevated risk for many diseases and health conditions, including,:


Body Mass Index Prime is method of using the results of the BMI calculations to quickly and easily rank a person into a category. Eg:
  • BMI Prime less than 0.74 = Underweight.
  • BMI Prime greater than 0.74 and less than 1.00 = Optimal weight.
  • BMI Prime greater than 1 = Overweight
Calculate your BMI and tell you if you are underweight, overweight or if your weight is optimal. Just enter your vital statistics and click the button. The results will be graphed out for you.

How it's calculated

The formula below is used to measure BMI
  • BMI = weight(kilograms) / height2 (metres2)         (Metric Units)
  • BMI = 703 . weight(pounds) / height2 (inches2)         (Imperial Units)

BMI limitations

BMI is proportional to the mass and inversely proportional to the square of the height. So, if all body dimensions double, and mass scales naturally with the cube of the height, then BMI doubles instead of remaining the same. This results in taller people having a reported BMI that is uncharacteristically high, compared to their actual body fat levels.