According to the calculation method of the World Health Organization:
Male: (height cm-80) × 70% = standard weight.
So the boy's height is 180cm, and the corresponding standard weight is 70kg.
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.
Extended data:
What's the standard weight?
Everyone's figure is different, including height, body shape and gender, so everyone's standard weight is different, which depends on body mass index, body fat rate, visceral fat grade, muscle mass and other indicators.
(1) Body mass index (BMI) = weight (kg) ÷ height 2 (m)
For example: 70kg (1.75x1.75) = 22.86.
That is to say, the body mass index of adult males is between 20-25 and that of females is between 19-24, which is considered as a normal range. Beyond this range, you need to lose weight, and below this range, you need to gain weight.
(2) Body fat rate is also very important, with adult males in the normal range of 13- 18 and adult females in the normal range of 18-23.
(3) Visceral fat grade is less than 9 and below 4.5 is healthier.
(4) Muscle mass is related to height and bones, which is specific to everyone. People with large muscle mass have high basal metabolism and are easy to form lean physique. Even people who are thin have high muscle mass and are relatively healthy. People with large muscles are in better shape than people with the same height and weight.
Baidu encyclopedia-standard weight
People's Health Network-How much is the standard weight?