1, weight measurement should be carried out after taking off clothes, shoes and socks. For those over 7 years old, the accurate reading is 100 g when measured with a lever scale with a load of 100kg.

2. Don't touch or shake the object when weighing, and stand in the center of the stop sign.

3. Generally, the weight is the most stable after defecation on an empty stomach in the morning, so this is the best time to measure the weight. If you can't do it at this time, you should also have a fixed time (such as a unified time every day), fast one hour before the measurement, and empty your urine.

4. Weight (especially for adults) often fluctuates seasonally throughout the year. Generally, it increases in spring and winter and decreases in summer. Weight changes throughout the day, with changes in diet, excretion and sweating. Generally, the weight is the most stable after defecation on an empty stomach in the morning.

5. It is best for infants to use a disk-type lever scale with load 10~ 15kg and accuracy 10g, and a lever scale with load of 50kg and accuracy of 50 g for school-age children. ..

Extended data:

Simple calculation method:

1. Calculation method 1:

Body mass index = square kilogram of body weight/square meter (kilogram)/height (meter)

Formula writing: body mass index = weight/(height) 2

Normal weight: body mass index = 18.5-25 (China physical health standard: normal range: 18.5~23.9, overweight 24.0~27.9, obesity ≥28.0).

Overweight: body mass index = 25-30.

Mild obesity: body mass index >; 30

Moderate obesity: body mass index >; 35

Severe obesity: body mass index >; 40

2. Calculation method 2:

Standard weight = height (m) × height (m) × standard coefficient (female 20, male 22)

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.

3. Calculation method 3:

Standard weight (kg) = height (cm)-105

For example, a man with a height of 170cm should weigh170 (cm)-105 = 65 (kg). Those who exceed the standard weight 10% are overweight, and those who exceed 20% are obese; Under 0/0% of standard weight/kloc, those below 20% are thin.

Note: The above calculation method is only applicable to adults. Not suitable for children, old people or people who are too short.

4. Blocker formula:

Height 165cm or less: standard weight (kg)= height (cm)- 100.

Height1over 65cm: standard weight (kg)= height (cm)- 1 10.

5. Calculation formula of Asian standard weight:

Professor Gui of Kyoto University put forward the following calculation formula on the basis of Blocker formula:

Standard weight (kg) = [height (cm)-100]×0.9.

Note: The calculation result of this formula is suitable for the specific situation of Asians.

6. Formulas for China people divided by north and south regions:

The ideal weight of northerners (kg)=[ height (cm)-150] × 0.6+50;

The ideal weight of southerners (kg)=[ height (cm)- 150]×0.6+48.