Calculate Your Body Mass Index

Body mass index or BMI is a measure of body fat based on height and weight. You use it to get an idea of where you "should" be weight wise based on your height.

BMI is a indicator of how much fat you have, yet it does not measure the fat directly, it is considered though as a direct fat measuring alternative.

The reason body mass index is used is to screen for potential weight problems in adults. But do not consider it a diagnostic tool, if you have a high BMI, you should see your health care provider.

The reason I put "should" in quotes is because everybody is different. Some people are just bigger than others and some people are just smaller than others.

I have a very good friend that has a bmi that suggests that he is overweight but he is extremely healthy and fit. It is in his genes to be a bigger guy.

So do not stress over these numbers if you are a naturally bigger or smaller person. The correlation between bmi and weight varies by sex, race and age.

For example:

Women tend to have to more body fat than men at the same BMI. Also older people tend to have more body fat than younger people. Also highly trained athletes may have a high body mass index because of increased muscularity not fat

How BMI is Calculated

In kilogramsFormula: weight (kg) / [height (m)]2

With the metric system, the formula for BMI is weight in kilograms divided by height in meters squared. Since height is commonly measured in centimeters, divide height in centimeters by 100 to obtain height in meters.

Example: Weight = 68 kg, Height = 165 cm (1.65 m)Calculation: 68 ÷ (1.65)2 = 24.9

In pounds:Formula: weight (lb) / [height (in)]2 x 703

Calculate BMI by dividing weight in pounds (lbs) by height in inches (in) squared and multiplying by a conversion factor of 703.

Example: Weight = 150 lbs, Height = 5'5" (65")Calculation: [150 ÷ (65)2] x 703 = 24.96

Calculate Your Body Mass Index

What The Numbers Mean

Below 18.5Underweight
18.5 - 24.9Normal
25.0 - 29.9Overweight
30.0 and AboveObese

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