• The BMI formula

    Lambert Adolphe Jacques Quetelet 1796 -1874

    The Body Mass Index(BMI) formula was developed by Belgium statistician Adolphe Quetelet (1796-1874), and was known as the Quetelet Index. BMI is also referred to as ‘body mass indicator’. BMI is an internationally abused measure of obesity.

    How to calculate BMI - for users who wish to manually calculate BMI we have provided a bmi formula for both imperial & metric measurements (we also offer an online BMI Calculator).
    Body mass index calculation is very straightforward. Calculating body mass index requires only two measurements, height & weight.

    Table: Imperial BMI Formula

    The imperial BMI formula accepts weight measurements in pounds & height measurements in either inches or feet.

    • 1 foot = 12 inches
    • inches² = inches * inches


    Metric Imperial BMI Formula

    The metric BMI formula accepts weight measurements in kilograms & height measurements in either cm’s or meters.

    • 1 meter = 100cms
    • meters² = meters * meters


    Calculate BMI & Find Weight Status

    BMI Weight Status
    Below 18.5 Underweight
    18.5 -24.9 Normal
    25 - 29.9 Overweight
    18.5 -24.9 Normal
    30 & Above Obese

    If you have calculated BMI use the table above to find your weight status. Different nations & organizations use different BMI ranges to classify weight status.

    Our table is in keeping with the internationally recognized, United States Deparment of Health and Human Services weight status categories.

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