BMI-for-age* BOYS Birth to 2 years (z-scores) Z-scores (BMI in kg/m2) -1 SD Median
Month
L
M
S
-3 SD
-2 SD
1 SD
2 SD
3 SD
0 1 2 3 4 5 6
0 1 2 3 4 5 6
-0.3053 0.2708 0.1118 0.0068 -0.0727 -0.1370 -0.1913
13.4069 14.9441 16.3195 16.8987 17.1579 17.2919 17.3422
0.09560 0.09027 0.08677 0.08495 0.08378 0.08296 0.08234
10.2 11.3 12.5 13.1 13.4 13.5 13.6
11.1 12.4 13.7 14.3 14.5 14.7 14.7
12.2 13.6 15.0 15.5 15.8 15.9 16.0
13.4 14.9 16.3 16.9 17.2 17.3 17.3
14.8 16.3 17.8 18.4 18.7 18.8 18.8
16.3 17.8 19.4 20.0 20.3 20.5 20.5
18.1 19.4 21.1 21.8 22.1 22.3 22.3
0: 7 0: 8 0: 9 0:10 0:11 1: 0
7 8 9 10 11 12
-0.2385 -0.2802 -0.3176 -0.3516 -0.3828 -0.4115
17.3288 17.2647 17.1662 17.0488 16.9239 16.7981
0.08183 0.08140 0.08102 0.08068 0.08037 0.08009
13.7 13.6 13.6 13.5 13.4 13.4
14.8 14.7 14.7 14.6 14.5 14.4
16.0 15.9 15.8 15.7 15.6 15.5
17.3 17.3 17.2 17.0 16.9 16.8
18.8 18.7 18.6 18.5 18.4 18.2
20.5 20.4 20.3 20.1 20.0 19.8
22.3 22.2 22.1 22.0 21.8 21.6
1: 1: 1: 1: 1: 1:
13 14 15 16 17 18
-0.4382 -0.4630 -0.4863 -0.5082 -0.5289 -0.5484
16.6743 16.5548 16.4409 16.3335 16.2329 16.1392
0.07982 0.07958 0.07935 0.07913 0.07892 0.07873
13.3 13.2 13.1 13.1 13.0 12.9
14.3 14.2 14.1 14.0 13.9 13.9
15.4 15.3 15.2 15.1 15.0 14.9
16.7 16.6 16.4 16.3 16.2 16.1
18.1 18.0 17.8 17.7 17.6 17.5
19.7 19.5 19.4 19.3 19.1 19.0
21.5 21.3 21.2 21.0 20.9 20.8
19 20 21 22 23 24†
-0.5669 -0.5846 -0.6014 -0.6174 -0.6328 -0.6473
16.0528 15.9743 15.9039 15.8412 15.7852 15.7356
0.07854 0.07836 0.07818 0.07802 0.07786 0.07771
12.9 12.8 12.8 12.7 12.7 12.7
13.8 13.7 13.7 13.6 13.6 13.6
14.9 14.8 14.7 14.7 14.6 14.6
16.1 16.0 15.9 15.8 15.8 15.7
17.4 17.3 17.2 17.2 17.1 17.0
18.9 18.8 18.7 18.7 18.6 18.5
20.7 20.6 20.5 20.4 20.3 20.3
Year: Month 0: 0: 0: 0: 0: 0: 0:
1 2 3 4 5 6
1: 7 1: 8 1: 9 1:10 1:11 2: 0
WHO Child Growth Standards *
If a child aged less than 2 years is measured standing up, change the height to length by adding 0.7 cm BEFORE calculating BMI, because the BMI-for-age for Birth to 2 years is based on length. For children 2 to 5 years measured lying down, convert length to height by subtracting 0.7 cm BEFORE calculating BMI for application of the BMI-for-age chart. † 24 months corresponds to 730 days.