Body mass index (BMI) measures whether a person is too thin or too fat by the ratio of height to weight. The calculation method of body mass index is to divide the kilograms of weight by the square of height (unit: meter). The formula is: body mass index (BMI) = weight (kg)/height (m). Weight of women with standard figure = 19χ height χ height, weight of men with standard figure =22χ height χ height.

Who calculation method

Male: (height cm-80) × 70% = standard weight.

Female: (height cm-70) × 60% = standard weight.

Standard weight plus or minus 10% is normal weight.

Standard weight plus or minus 10 ~ 20% overweight or underweight.

Obesity or underweight is defined as plus or minus 20% of standard weight.

Overweight calculation formula

Overweight% = [(actual weight-ideal weight)/(ideal weight) ]× 100%