Healthy adult BMI

BMI for adults: 8 st, 5 lb 9 ft, 0 in

This B.M.I. checker will quickly show if your weight is perfect, severely underweight or obese.


B.M.I. Prime is simple way of defining a single figure that is not immedieately related to any other units of measurement, but which can quickly and easily rank a person into a category. Eg:

  • BMI Prime < 0.74 = Underweight
  • BMI Prime > 0.74 and < 1.00 = Optimal weight
  • BMI Prime > 1 = Overweight

Body Mass Index Formula

You can use the following formula to calculate your BMI:

    BMI = weight(kilograms) / height2 (metres2)         (Metric Units)
    BMI = 703 . weight(pounds) / height2 (inches2)         (Imperial Units)