Body fat calculator is a tool used to estimate the percentage of fat in a person's body. There are several different types of body fat calculators, but some of the most common ones are based on skinfold measurements, body circumference measurements, or bioelectrical impedance analysis (BIA).
Skinfold measurements involve using calipers to pinch and measure the thickness of folds of skin at various locations on the body, such as the triceps, biceps, and subscapular regions. The measurements are then used to calculate an estimate of body fat percentage using equations specific to the type of skinfold measurement being used.
Body circumference measurements involve using a tape measure to measure the circumference of various body parts, such as the waist, hips, and neck. Again, equations specific to the type of circumference measurement being used are used to calculate an estimate of body fat percentage.
BIA involves passing a small electrical current through the body and measuring the resistance to the current. This resistance is then used to calculate an estimate of body fat percentage.
It's important to note that these calculators provide estimates and may not be entirely accurate. Other factors, such as muscle mass and bone density, can affect the results. A trained professional should be consulted for more accurate measurements.
Here are the body fat formulas for the US Navy, Jackson-Pollock, Durnin and Womersley, and Covert Bailey methods:
US Navy Body Fat Formula:
Men: % body fat = 86.010 x log10(abdomen - neck) - 70.041 x log10(height) + 36.76
Women: % body fat = 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387
Jackson-Pollock 3-Site Skinfold Formula:
Men: % body fat = (0.29288 x sum of chest, abdomen, and thigh skinfolds) - (0.0005 x square of the sum of chest, abdomen, and thigh skinfolds) + (0.15845 x age) - 5.76377
Women: % body fat = (0.29669 x sum of triceps, thigh, and suprailiac skinfolds) - (0.00043 x square of the sum of triceps, thigh, and suprailiac skinfolds) + (0.02963 x age) + 1.4072
Durnin and Womersley 4-Site Skinfold Formula:
Men: % body fat = (0.1051 x sum of chest, abdomen, thigh, and triceps skinfolds) - 4.15
Women: % body fat = (0.1548 x sum of triceps, thigh, suprailiac, and subscapular skinfolds) - 6.58
Covert Bailey's Formula:
% body fat = (1.51 x BMI) - (0.70 x age) - (3.6 x sex) + 1.4
BMI = weight (kg) / height^2 (m)
sex = 0 for females, 1 for males
It's important to note that these formulas provide estimates and may not be entirely accurate. Other factors, such as muscle mass and bone density, can affect the results. A trained professional should be consulted for more accurate measurements.
Skinfold measurements involve using calipers to pinch and measure the thickness of folds of skin at various locations on the body, such as the triceps, biceps, and subscapular regions. The measurements are then used to calculate an estimate of body fat percentage using equations specific to the type of skinfold measurement being used.
Body circumference measurements involve using a tape measure to measure the circumference of various body parts, such as the waist, hips, and neck. Again, equations specific to the type of circumference measurement being used are used to calculate an estimate of body fat percentage.
BIA involves passing a small electrical current through the body and measuring the resistance to the current. This resistance is then used to calculate an estimate of body fat percentage.
It's important to note that these calculators provide estimates and may not be entirely accurate. Other factors, such as muscle mass and bone density, can affect the results. A trained professional should be consulted for more accurate measurements.
Here are the body fat formulas for the US Navy, Jackson-Pollock, Durnin and Womersley, and Covert Bailey methods:
US Navy Body Fat Formula:
Men: % body fat = 86.010 x log10(abdomen - neck) - 70.041 x log10(height) + 36.76
Women: % body fat = 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387
Jackson-Pollock 3-Site Skinfold Formula:
Men: % body fat = (0.29288 x sum of chest, abdomen, and thigh skinfolds) - (0.0005 x square of the sum of chest, abdomen, and thigh skinfolds) + (0.15845 x age) - 5.76377
Women: % body fat = (0.29669 x sum of triceps, thigh, and suprailiac skinfolds) - (0.00043 x square of the sum of triceps, thigh, and suprailiac skinfolds) + (0.02963 x age) + 1.4072
Durnin and Womersley 4-Site Skinfold Formula:
Men: % body fat = (0.1051 x sum of chest, abdomen, thigh, and triceps skinfolds) - 4.15
Women: % body fat = (0.1548 x sum of triceps, thigh, suprailiac, and subscapular skinfolds) - 6.58
Covert Bailey's Formula:
% body fat = (1.51 x BMI) - (0.70 x age) - (3.6 x sex) + 1.4
BMI = weight (kg) / height^2 (m)
sex = 0 for females, 1 for males
It's important to note that these formulas provide estimates and may not be entirely accurate. Other factors, such as muscle mass and bone density, can affect the results. A trained professional should be consulted for more accurate measurements.
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