What is Body Mass Index? How BMI Calculator?

Body Mass Index, Trend Health

To measure whether the Body Weight is standard, you can refer to the Body Mass Index (BMI) adopted by the World Health Organization, which is currently the most commonly used international index to measure the standard body.

Body Mass Index uses the ratio between height and weight to measure whether a person is too fat or too thin. The calculation formula is as follows:

BMI = Body Weight (kg) ÷ Height (㎡)

The standard BMIs for men and women are different. The standard Body Mass Index BMI for men ranges from 20 to 25; for women, it ranges from 18 to 22. The World Health Group has the following definition of obesity:

  • Obesity: BMI = or greater than 30kg / ㎡
  • Overweight: BMI ranges from 25.0 to 29.9 kg / ㎡
  • Ideal (Non-overweight): BMI is about 19.0 to 24.9 kg / ㎡

If your BMI exceeds 30, it has been classified as obese in medicine and may cause some chronic diseases, such as High Blood Pressure, cardiovascular disease, Hyperlipidemia, Depression, etc., so you must be alert and actively lose weight.

And after proper Weight Loss can reduce the chance of suffering from the above diseases, so countries around the world gradually pay attention to the physical and psychological damage and economic burden caused by obesity.

In addition, after losing weight, if the obese people do not have strict monitoring, most of their weight will rise, so it takes a long time to control and deal with.

Ideal weight calculation

Obesity refers to the accumulation of excess fat in the body, but it is more difficult to measure the fat content. There are currently three methods to define the definition of Obesity, one of which is the ideal weight method.

Since the ideal weights for men and women are different, the calculation equations are also different:

Male ideal weight

 (Kg) = 62 + 0.6 × (height (cm)-170)

Female ideal weight

 (Kg) = 52 + 0.5 × (height (cm) -158)


Male ideal weight

 (Kg) = (height (cm) -80) × 0.7)

Female ideal weight

 (Kg) = (height (cm) -70) × 0.6)

The calculated results are within the normal range of 10 to 20% of the ideal body weight. If the weight is 45 kilograms or more than the ideal weight, it is morbidly obese, you must find a doctor to make a diagnosis and make appropriate weight loss.

Measurement of waist-to-hip ratio

With the increase of age, men and women will have different degrees of “blessing” by middle age. Obesity is mostly caused by the deposition of fat, and the situation will be different between men and women.

Women’s excess fat is usually stored in the buttocks and thighs, while men store it in the abdomen. The receptor deposited on the surface of the fat cells in the waist and abdomen is a receptor called β. This receptor is a receptor harmful to human health. When it is combined with cholesterol and protein, it forms a low-density lipoprotein and penetrates. Blood vessels, which deposit on the walls of blood vessels, cause arteriosclerosis.

The surface of fat cells on the buttocks is mostly a receptor. This receptor combines with cholesterol and protein to form a denser lipoprotein. It has the effect of maintaining blood vessels and softening blood vessels, which is beneficial to health.

According to relevant information, the incidence of coronary heart disease is 3 to 5 times higher than that of normal people, the incidence of diabetes is 3 to 9 times higher, and the incidence of gallstones and kidney stones is 4 to 6 times that of normal people.

Fat people are also prone to premature aging, and the mortality rate is 25% to 50% higher than normal people of the same age. For women, the bust and hip circumference are larger, the shoulders are wider, the thighs are thicker, and the waist and abdomen are thinner. It is the most ideal body shape and is in good health.

The measurement of the “waist-to-hip ratio” is very simple. When measuring, the waist and hip circumference shall be the largest, and the waist will be divided by the hip circumference, and the value is the “waist-to-hip ratio”. The reasonable ratio of “waist to hip ratio” is 0.85 to 0.9 for men and 0.75 to 0.8 for women.

For example, a man’s waist circumference is 80 cm, hip circumference is 90 cm, and the “waist-to-hip ratio” is 0.89, which is an ideal figure. If the “waist-to-hip ratio” exceeds the upper limit, self-care such as health check-ups, exercise and fitness, and balanced nutrition should be carried out in time.

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