How to calculate Body fat percentage in your body:

First of all we have to know the definition of body fat %:

Body fat percentage refers to the % of fat in the body .

so if your weight is 200 pounds and your body fat % is 15% , this means that the fat in your weighs 30 pounds , and your lean body weight " muscle , blood , bone ' is 170 pounds .
So ,

How to calculate Body fat percentage in your body:

Easiest Formula: 

Calculation of body fat percentage for men:

- You have to weigh your self in pounds " 1 kg equals 2.2 Pounds " .

- You have to measure your waist in inches " 1 inch equals 2.5 cm " .

Then Apply this formula:

* Multiply your total body weight by (1.082) Then add 94.42 to the result .

      ( Body weight x 1.082 ) + 94.42 = A

* Multiply your Waist by 4.15 .

      ( Waist measurement x 4.15 ) = B

* A - B = Lean body weight .

* Body fat weight = Total weight of the body - Lean body weight 

* And finally :

    Body fat % = Body fat weight multiplies by 100 and divide the result on your total body weight .

    Body fat % = ( body fat weight x 100 ) / total body weight .

Calculation of body fat percentage for Women:

* A= " Total Body Weight x 0.732 " + 8.987

* B= Measurement of the Wrist " full point " / 3.140

* C= measurement of the Waist " at the umbilicus " x 0.157

* D= Measurement of the hip x 0.249

* E= Measurement of the forearm x 0.434

* Lean body weight = A+B-C-D+E

* Body fat weight = Total body weight - Lean body weight

And Finally 
* Body fat % = " Fat weight x 100 " / the total body weight .

* Classification of body fat % according to sex :