The Broca formula began the history of the ideal weight calculations back in 1871. Dr. P.P. Broca, a French surgeon, created this formula also known as Broca's index;
Men: IBW (kilograms) = [Height (cm) - 100] - ([Height (cm) - 100] x 10%)
Women: IBW (kilograms) = [Height (cm) - 100] + ([Height (cm) - 100] x 15%)This was later translated into a more simplified formula by an unknown person. The simple version is;
Devine formulaThe Devine formula, published in 1974 by Dr. BJ Devine, was intended for medical use in order to calculate the dosage of certain medicines. While this was intended for dosage purposes, it quickly became one of the more common formulas used in ideal weight calculators on the web.
Men: Ideal Body Weight (kilograms) = 50 + 2.3kg per inch over 5 feet
Women: Ideal Body Weight (kilograms) = 45.5 + 2.3kg per inch over 5 feet
In 1983 Dr. JD Robinson and Dr. DR Miller published a modification to the Devine formula.
The Robinson formula is;
Men: IBW (kilograms) = 52kg + 1.9kg for each inch over 5 feet
Women: IBW (kilograms) = 49kg + 1.7kg for each inch over 5 feet.
Men: Ideal Body Weight (kilograms) = 56.2kg + 1.41kg for each inch over 5 feet
Women: Ideal Body Weight (kilograms) = 53.1kg + 1.36kg for each inch over 5 feet
The Hamwi formula is similar to the Devine formula. It is also intended for dosage purposes of some medicines. This formula is;
Men: IBW kilograms) = 48kg + 2.7kg for each inch over 5 feet
Women: IBW (in kilograms) = 45.5kg + 2.2kg for each inch over 5 feet
All of the above formulas are widely used on the web to calculate the ideal body weight. So which one is the best?
There is no one best formula nor are any of them an exact science. Some experts will tell you that the Body Mass Index is a better indication to tell you if you are underweight or overweight.The BMI is just one tool used by doctors to help determine if a person has a weight issue.
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