Beurer BF 600 Pure - Инструкция по эксплуатации - Страница 19

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9. Evaluating the results

Body mass index

The Body Mass Index (BMI) is a figure that is commonly used to evaluate body weight. The figure is calcu-

lated from body weight and height. The formula is:

Body mass index = body weight ÷ height

2

. The measurement unit for BMI is [kg/m

2

]. According to the BMI, 

weight is classified for adults (20 years and over) using the following values:

Category

BMI

Underweight

Severely underweight

<16

Underweight

16-16.9

Slightly underweight

17-18.4

Normal weight

18.5-25

Overweight

Overweight

25.1-29.9

Obese (overweight)

Class I obesity

30-34.9

Class II obesity

35-39.9

Class III obesity

≥40

Source: WHO, 1999 (World Health Organization)

Body fat percentage

The subsequent body fat percentages serve as a guideline (for further information ask your doctor). 

Male

Female

Age

Low

Normal

High

Very 

high

Age

Low

Normal

High

Very 

high

10-14

<11%

11-16%

16.1 – 21% >21%

10-14

<16 %

16 – 21% 21.1 – 26% >26%

15-19

<12 %

12-17%

17.1 – 22% >22%

15-19

<17 %

17 – 22% 22.1 – 27% >27%

20 – 29

<13%

13-18 %

18.1 – 23% >23%

20-29

<18 %

18 – 23% 23.1 – 28% >28%

30 – 39

<14%

14-19 %

19.1 – 24% >24%

30-39

<19 %

19 – 24% 24.1 – 29% >29 %

40 – 49

<15%

15 – 20% 20.1 – 25% >25%

40-49

<20 %

20 – 25% 25.1 – 30% >30%

50 – 59

<16%

16 – 21% 21.1 – 26% >26%

50-59

<21 %

21 – 26% 26.1 – 31% >31%

60 – 69

<17%

17 – 22% 22.1 – 27% >27%

60-69

<22 %

22 – 27% 27.1 – 32% >32%

70-100 <18 %

18 – 23% 23.1 – 28% >28%

70-100 <23 %

23 – 28% 28.1– 33% >33%

A lower value will often be determined in the case of athletes. Depending on the sporting activities per-

formed, the training intensity and the physical constitution, the results may still be below the stated stand-

ard values. Please note, however, that there may be a risk to health in the case of extremely low values. 

Body water content

The body water content in % is normally within the following ranges:

Male

Female

Age

Poor

Good

Very good

Age

Poor

Good

Very good

10-100

<50 %

50 – 65%

>65%

10-100

<45 %

45 – 60%

>60%

Body fat contains relatively little water, therefore body water content may be below the standard values in 

persons with a high body fat percentage. On the other hand, endurance athletes may exceed the standard 

values due to having low levels of fat and a high muscle percentage.

The body water calculation performed using this scale is not suitable for drawing medical conclusions, 

for example in the case of age-related water retention. Consult your doctor where necessary. A high body 

water content is generally desirable.