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%

Extended data unequal age algorithm

Standard weight method

Standard weight (kg) = age x 2+8 (7- 16 years old)

Mild obesity: 20%-30% overweight.

Moderate obesity: 30%-50% overweight.

Severe obesity: more than 50% of standard weight.

Refer to Baidu Encyclopedia standard weight