How To Calculate Your Body Fat Percentage

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Your body fat percentage helps you determine your diet and exercise needs. The number gives you an idea of how much of your body is composed of fat, muscles, and tissue.

Step 1: Know the ranges for women
Know the body fat ranges to aim for if you’re a woman. 10 percent body fat is the absolute minimum; athletes tend to be in the 14 to 20 percent range. Fit people are at 21 to 24 percent. 25 to 31 percent is acceptable, and 32 percent and higher is too much.

Step 2: Know the ranges for men
Know the body fat ranges to shoot for if you’re a man. For men, 2 to 4 percent is essential, athletes are 6 to 13 percent, fit men are 14 to 17 percent, and 18 to 25 percent is considered acceptable. 26 percent or more is considered excessive.

Step 3: Avoid water and exercise
Prepare for taking your measurements. Don’t drinking too much water or exercise 2 hours before taking measurements as this can skew the body fat percentage scores.

Step 4: Locate measurement sites
Locate the sites for skin-fold measurements. For men, the sites are diagonally on the chest, and vertically on the abdominals and thighs. For women, the sites are vertically on the triceps and thighs, and diagonally on the suprailiac, which is midway between the hip joint and the rib cage.

Step 5: Use a caliper
Use a caliper to take skin-fold measurements. Pinch and pull a fold of skin using your index finger and thumb. Use the caliper to take a measurement one centimeter away. Wait a few seconds for the fat to compress. Take the measurements from your right side, and take two from each site.

Have a trained professional take skin-fold measurements to get the most accurate numbers.

Step 6: Calculate your body density
Add your skin-fold measurements, and enter the sum into the body density equation to calculate your body density. For women, the equation is .0000023 times the sum squared, minus your age multiplied by .0001392, minus .0009929 multiplied by the sum, plus 1.0994921. For men, the numbers are .0000016, .0002574, .0008267, and 1.1093800.

Step 7: Determine body fat percentage
Determine your body fat percentage by dividing 495 by your body density and subtracting 450.

To avoid number crunching, use an online calculator to determine your body density and fat percentage based on your skin-fold measurements.

Step 8: Take a bioelectrical impedance analysis
Take a bioelectrical impedance analysis using a fat-percentage scale if you want to bypass the math. The scale sends a low-voltage electrical current through your body to measure your fat percentage. Electricity goes faster through fat-free mass like muscles.

Step 9: Understand the error rate
Understand that the error rate for these methods can be as high as 8 percent, but your body fat percentage range will give you a good idea of your body makeup and what goals you should aim for. Now you know your body-fat percentage, and can set accurate goals.

Did You Know?
According to the Centers for Disease Control, Mississippi had the highest obesity rate in 2009 at 34.4 percent.




  1. zero zero zero zero zero zero zero zero zero zero zero zero zero zero zero
    zero zero zero zero zero zero zero zero zero zero zero zero zero zero zero
    zero zero zero zero zero zero zero zero zero zero zero zero… Ok I got it,
    i can read too!

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  5. I’ve given up on this before starting. zero zero zero. Ican see i’m
    blatantly between 10 and 15 so fu*k it!

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  7. Hello everyone, I would like to recommend not using the formula used in
    this video which was (495/Bodydensity) – 450 for converting density into
    body fat which was created by Siri in 1961. Instead, you should use
    (457/Bodydensity) – 414 which is a little more accurate and was created by
    Bronzek et al in 1963. Warning! the more accurate formula might make you a
    little disappointed due the fact that it’s more accurate.