Body Fat Calculator

 
Gender
Weight
kilos
Height
meters
Age
years
Body Fat percentage  =  22.18%
CALCULATE
CALCULATE

Body Fat Calculator

    Body Fat Calculator uses details like sex, height, weight, and age to calculate what percent- age of our total body weight is body fat.
    The Body Fat Calculator uses four inputs to provide what percentage of our body weight comprises of body fat. It is necessary to follow the next steps:
  • Enter sex. Choose one of two given options;
  • Enter the Body height, measured in meters. The value must be positive in the range [0.3, 2.3];
  • Enter the Body weight, measured in kilograms. The value must be positive in the range [20, 220];
  • Enter the age. The age value must be in the range [0, 105];
  • Press the ”Calculate” button to make the computation.
Percent Body Fat Formula (PBF) for adults:
The percent body fat for adults can be calculated by the following formulas
PBFmen = 1.20 × BMI + 0.23 × Age − 16.2

PBFwomen = 1.20 × BMI + 0.23 × Age − 5.4

Percent Body Fat Formula (PBF) for teenagers:
The percent body fat for teenagers can be calculated by the following formulas
PBFmen = 1.51 × BMI - 0.7 × Age − 2.2

PBFwomen = 1.51 × BMI - 0.7 × Age + 1.4

where BMI = weight/height2.

Body Fat Weight Formula:
The body fat weight can be calculated by the following formula
body fat = weight × body fat percentage 100

What represents the term Body Fat?
    Body fat is the body’s energy depot. Without fat, certain vitamins and minerals cannot be resorbed in the body, hormones cannot be produced, and fats also have important reproductive functions. Fats store energy, fats regulate body temperature, and so on. The percentage of body fat or fat is an indicator of the amount of adipose tissue of a person and is expressed as a percentage. This percentage is higher in women than in men, primarily due to the needs of childbirth, hormonal and other functions. Fats are stored in the body in subcutaneous adipose tissue, and also, fat deposits have a protective function around the internal organs.

How to calculate Percent Body Fat?

    To perform a proper calculation, we need to know sex, height, weight and age of a person. The Percent Body Fat calculator uses Deurenberg formulas [1].
    For example, let us calculate Percent Body Fat for a 30 years old man who has 1.9 meters, and weighs 95 kilograms.
PBFmen = 1.20 × 26.32 + 0.23 × 30 − 16.2 ≈ 22.28%

    The percent body fat is 22.28%, it classifies our man as a healthy person, the message with the classification range is displayed automatically below the calculator.

Body fat rating female (% fat)
Age Low Healthy Increase Obese
13 < 16.4 16.5 - 33.8 33.9 - 36.5 > 36.6
14 < 16.3 16.4 - 34.0 34.1 - 36.7 > 36.8
15 < 16.1 16.2 - 34.2 34.3 - 36.9 > 37.0
16 < 15.8 15.9 − 34.5 34.6 - 37.1 > 37.2
17 < 15.4 15.5 - 34.7 34.8 - 37.3 > 37.4
18 - 39 < 21 21 – 32.9 33 – 38.9 > 39
40 - 59 < 23 23 – 33.9 34 – 39.9 > 40
> 60 < 24 24 – 35.9 36 – 41.9 > 42

Body fat rating male (% fat)
Age Low Healthy Increase Obese
13 < 11.6 11.7 - 27.5 27.6 - 31.3 > 31.4
14 < 11.1 11.2 - 26.4 26.5 - 30.0 > 30.1
15 < 10.8 10.8 - 25.4 25.5 - 28.7 > 28.8
16 < 10.4 10.5 - 24.7 24.8 - 27.7 > 27.8
17 < 10.1 10.1 - 24.2 24.3 - 26.8 > 26.9
18 - 39 < 8 8 – 19.9 20 – 24.9 > 25
40 - 59 < 11 11 – 21.9 22 – 27.9 > 28
> 60 < 13 13 – 24.9 25 – 29.9 > 30

    Body Fat Calculator allows us to change the units which are displayed. We can switch between centimeters, meters, kilograms, pounds, etc., according to needs and preferences.

Why and how does body fat increase?

    How much and how much body fat will accumulate depends on numerous factors such as genetics, lack of exercise, as well as overeating. Every person behaves differently when it comes to reducing accumulated body fat. If a person eats properly and exercises regularly, he has a great chance to reduce the accumulated fat. Men and women store body fat in different ways. When it comes to weight gain in the form of fat deposits, the total number of calories consumed is more important than where they come from (a lot or a little protein). Research shows that people who eat the same way, high-calorie food, gain almost identical weight. In people whose diet is poorer in protein, there is a smaller increase in total body weight compared to a diet with more protein, however, such a result is the result of loss of muscle mass due to reduced protein intake.

What are the complications of increasing body fat?

    Obesity is the oldest and still the most common metabolic problem in humans. It is a disease of modern man. There are about 400 million obese people in the world, which is about 15 percent of the world’s population. Obesity is a chronic condition in which fat is deposited in the human body in quantities that negatively affect health. Risk factors are different. Obesity is defined by the body mass index BMI. Obesity leads to medical complications that reduce the quality of life and shorten life expectancies, such as hypertension, cardiovascular and cerebrovascular diseases, hypercholesterolemia, diabetes, carcinoma, arthritis, digestive tract disorders, pregnancy complications, and mental disorders. Visceral fat is fat that is located deep in the abdominal cavity, below the muscle layer, and it coats organs like the liver, kidneys, heart, pancreas. This fat cannot be ”pinched”, and therefore cannot be ”seen”, unlike subcutaneous fat. However, it is visceral fat that is responsible for various pathological conditions (diseases) such as obesity, high blood pressure, cardiovascular diseases, type 2 diabetes, and even some malignant diseases. Visceral fat is necessary for a certain percentage, to provide the necessary protection to the internal organs that cover it. On average, visceral fat accounts for up to 20% of total body fat in men, while in women this percentage is significantly lower and amounts to about 5 - 8% of total body fat. This difference in the percentage of visceral fat between the sexes is a consequence of the different hormonal profiles of men and women. Estrogen, which is predominantly a female sex hormone, has, among other things, lipogenic properties, i.e. induces the storage of fatty acids in the depots of subcutaneous fat (especially in the thighs and buttocks), which prevents the storage of fatty acids in the depots of visceral fat. This is the reason why men are more prone to getting a ”beer belly” (visceral fat) and more likely to get cardiovascular disease compared to the opposite sex. Visceral fat is directly related to higher levels of low-density lipoprotein cholesterol (LDL), lower-density cholesterol (HDL), and insulin resistance. LDL cholesterol is ”bad cholesterol”, while HDL is ”good cholesterol”. High levels of LDL cholesterol can clog the arteries (atherosclerosis), and if they settle in the coronary blood vessels can lead to a heart attack. Insulin resistance can lead to high blood sugar levels and eventually to type 2 diabetes. Excess visceral fat has extremely negative effects on a person’s health.

References:
  • Deurenberg, P., Westrate, J.A. and Seidell, J.C. (1991) Body mass index as a measure of body fatness: Age- and sex-specific prediction formulas. British Journal of Nutrition, 65, 105-114. doi:10.1079/BJN19910073