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Q is for Quetelet's Index

Quetelet’s Index is the scientific name for Body Mass Index (BMI). Body Mass Index is a measure of relative fatness or lean body mass. We can determine our BMI by dividing our weight (kilograms) by our height squared(metres).

Eg. body weight = 68 kgs
      height = 1.67 m
      BMI = weight / height (squared)     
      BMI = 68/(1.67 x 1.67)
             = 24.38 kg/m2.