Calculate Your Fat Percentage

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It is helpful in determine your fat level in order to get on the right weight loss, weight gain, or maintenance program. Here is how BMI calculation is done.

BMI Categories:

  • Underweight = <18.5
  • Normal weight = 18.5-24.9
  • Overweight = 25-29.9
  • Obesity = BMI of 30 or greater

You first have to convert your weight in pounds into weight in kilograms. You do this by dividing your weight in pounds by 2.2. For a person who is 135 pounds this would be 135/2.2=61.4 kilograms

Then take your height in inches and convert it to centimeters. A 5’5’’ person would be 65 inches. Multiply the inches by 2.54. So the 5’5” person would be 65×2.54=165 centimeters (rounded).

Now convert the centimeters into meters (there are 100 cm in one meter)
which is 165/100=1.65

To calculate your fat percentage or “Body Mass Index”, divide kilograms by height. The formula is:  BMI=Kg/height in meters squared.

Height in meters squared in this example is (1.65 x 1.65) or 1.65²

Weight in kilograms in this example is 61.4.

For this example it would be written as 61.4/ (1.65 x 1.65). In other words it is 61.4 divided by (1.65 x 1.65). Multiply the numbers inside of the parentheses first and then divide the weight in kilograms by the resulting number.

So 61.4/ (1.65 x 1.65) = 61.4/2.7225 = 22.552.

Round the resulting number turn into a percentage by and you get 23 %.

This is your level of body fat.


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