ﺑﺎﺯﮔﺸﺖ ﺑﻪ ﺻﻔﺤﻪ ﻗﺒﻠﯽ
خرید پکیج
تعداد آیتم قابل مشاهده باقیمانده : -26 مورد

Calculator: Weight-for-length percentiles and Z-scores, 0 to 24 months (WHO)


 Calculator: Weight-for-length percentiles and Z-scores, 0 to 24 months (WHO)

 
Input
 
Sex Female

 Male
Length  
Weight  

 
Results
 
Important: Inputs must be complete to perform calculation.

 
 
Z-score  
Percentile  
 
Decimal precision  

 

 

 Weight-for-length percentile interpretation

 
Percentile <2: Underweight
Percentile ≥2 and <98: Healthy weight
Percentile ≥98: Overweight

 
 

 
Notes
  • This calculator is based on the World Health Organization (WHO) growth standard.
  • This calculator uses measured recumbent length for infants and toddlers from birth through 24 months of age.
  • It is not valid for standing height.
  • At the extremes (>97th percentile or <3rd percentile), small differences in percentiles represent clinically important differences. At these extremes, the Z-score is a more precise reflection of how far the measurement deviates from the mean and is a useful tool for tracking changes.
  • For all LMS tables, the row in the table corresponding to the patient-specific value is found in the first column of the table; values to be used for L (the Box-Cox power), M (the median), and S (the generalized coefficient of variation) in the equation for Z-score are retrieved.
  • The accuracy of the calculation can be assessed by viewing the graph of weight-for-length percentiles for this sex and age group in UpToDate.
  • Z-scores may be used to do a table lookup for the corresponding percentile in the Normal table percentiles for Z-score table (below). Numbers along the left side (Y-axis) of the table represent the first number and first decimal place of the Z-score, while the numbers along the top (X-axis) of the table represent the second decimal position of the Z-score.

 
Equations used
 
Z_Score = ((Weight/M)L - 1) / (L * S)
Percentile = ZtoPercentile(Z-score)

 

 
Examples
 
Z-scorePercentile equivalent
- 3.0
0.3
- 2.0
2.5
+ 2.0
97.5
+ 3.0
99.7

 
References
  1. World Health Organization. The WHO Child Growth Standards. https://www.who.int/childgrowth/standards/en/ (Accessed on June 26, 2023).

 

 LMS table: Weight-for-length percentiles, females 45 to 110 cm, WHO growth standard

 
Length [cm] Power [L] Median [M] Variation [S]
45.0 -0.3833 2.4607 0.0903
45.5 -0.3833 2.5457 0.0903
46.0 -0.3833 2.6306 0.0904
46.5 -0.3833 2.7155 0.0904
47.0 -0.3833 2.8007 0.0904
47.5 -0.3833 2.8867 0.0905
48.0 -0.3833 2.9741 0.0905
48.5 -0.3833 3.0636 0.0906
49.0 -0.3833 3.1560 0.0906
49.5 -0.3833 3.2520 0.0906
50.0 -0.3833 3.3518 0.0907
50.5 -0.3833 3.4557 0.0907
51.0 -0.3833 3.5636 0.0908
51.5 -0.3833 3.6754 0.0908
52.0 -0.3833 3.7911 0.0909
52.5 -0.3833 3.9105 0.0909
53.0 -0.3833 4.0332 0.0909
53.5 -0.3833 4.1591 0.0910
54.0 -0.3833 4.2875 0.0910
54.5 -0.3833 4.4179 0.0911
55.0 -0.3833 4.5498 0.0911
55.5 -0.3833 4.6827 0.0911
56.0 -0.3833 4.8162 0.0912
56.5 -0.3833 4.9500 0.0912
57.0 -0.3833 5.0837 0.0912
57.5 -0.3833 5.2173 0.0913
58.0 -0.3833 5.3507 0.0913
58.5 -0.3833 5.4834 0.0913
59.0 -0.3833 5.6151 0.0913
59.5 -0.3833 5.7454 0.0914
60.0 -0.3833 5.8742 0.0914
60.5 -0.3833 6.0014 0.0914
61.0 -0.3833 6.1270 0.0914
61.5 -0.3833 6.2511 0.0914
62.0 -0.3833 6.3738 0.0914
62.5 -0.3833 6.4948 0.0913
63.0 -0.3833 6.6144 0.0913
63.5 -0.3833 6.7328 0.0913
64.0 -0.3833 6.8501 0.0913
64.5 -0.3833 6.9662 0.0912
65.0 -0.3833 7.0812 0.0912
65.5 -0.3833 7.1950 0.0911
66.0 -0.3833 7.3076 0.0911
66.5 -0.3833 7.4189 0.0911
67.0 -0.3833 7.5288 0.0910
67.5 -0.3833 7.6375 0.0910
68.0 -0.3833 7.7448 0.0909
68.5 -0.3833 7.8509 0.0909
69.0 -0.3833 7.9559 0.0908
69.5 -0.3833 8.0599 0.0907
70.0 -0.3833 8.1630 0.0907
70.5 -0.3833 8.2651 0.0906
71.0 -0.3833 8.3666 0.0906
71.5 -0.3833 8.4676 0.0905
72.0 -0.3833 8.5679 0.0904
72.5 -0.3833 8.6674 0.0904
73.0 -0.3833 8.7661 0.0903
73.5 -0.3833 8.8638 0.0902
74.0 -0.3833 8.9601 0.0902
74.5 -0.3833 9.0552 0.0901
75.0 -0.3833 9.1490 0.0901
75.5 -0.3833 9.2418 0.0900
76.0 -0.3833 9.3337 0.0899
76.5 -0.3833 9.4252 0.0898
77.0 -0.3833 9.5166 0.0898
77.5 -0.3833 9.6086 0.0897
78.0 -0.3833 9.7015 0.0896
78.5 -0.3833 9.7957 0.0896
79.0 -0.3833 9.8915 0.0895
79.5 -0.3833 9.9892 0.0895
80.0 -0.3833 10.0891 0.0894
80.5 -0.3833 10.1916 0.0893
81.0 -0.3833 10.2965 0.0893
81.5 -0.3833 10.4041 0.0892
82.0 -0.3833 10.5140 0.0892
82.5 -0.3833 10.6263 0.0891
83.0 -0.3833 10.7410 0.0891
83.5 -0.3833 10.8578 0.0891
84.0 -0.3833 10.9767 0.0890
84.5 -0.3833 11.0974 0.0890
85.0 -0.3833 11.2198 0.0890
85.5 -0.3833 11.3435 0.0890
86.0 -0.3833 11.4684 0.0890
86.5 -0.3833 11.5940 0.0890
87.0 -0.3833 11.7201 0.0890
87.5 -0.3833 11.8461 0.0890
88.0 -0.3833 11.9720 0.0890
88.5 -0.3833 12.0976 0.0890
89.0 -0.3833 12.2229 0.0890
89.5 -0.3833 12.3477 0.0890
90.0 -0.3833 12.4723 0.0891
90.5 -0.3833 12.5965 0.0891
91.0 -0.3833 12.7205 0.0891
91.5 -0.3833 12.8443 0.0892
92.0 -0.3833 12.9681 0.0892
92.5 -0.3833 13.0920 0.0893
93.0 -0.3833 13.2158 0.0893
93.5 -0.3833 13.3399 0.0894
94.0 -0.3833 13.4643 0.0895
94.5 -0.3833 13.5892 0.0896
95.0 -0.3833 13.7146 0.0896
95.5 -0.3833 13.8408 0.0897
96.0 -0.3833 13.9676 0.0898
96.5 -0.3833 14.0953 0.0899
97.0 -0.3833 14.2239 0.0900
97.5 -0.3833 14.3537 0.0901
98.0 -0.3833 14.4848 0.0902
98.5 -0.3833 14.6174 0.0903
99.0 -0.3833 14.7519 0.0904
99.5 -0.3833 14.8882 0.0906
100.0 -0.3833 15.0267 0.0907
100.5 -0.3833 15.1676 0.0908
101.0 -0.3833 15.3108 0.0910
101.5 -0.3833 15.4564 0.0911
102.0 -0.3833 15.6046 0.0912
102.5 -0.3833 15.7553 0.0914
103.0 -0.3833 15.9087 0.0916
103.5 -0.3833 16.0645 0.0917
104.0 -0.3833 16.2229 0.0919
104.5 -0.3833 16.3837 0.0920
105.0 -0.3833 16.5470 0.0922
105.5 -0.3833 16.7129 0.0924
106.0 -0.3833 16.8814 0.0925
106.5 -0.3833 17.0527 0.0927
107.0 -0.3833 17.2269 0.0929
107.5 -0.3833 17.4039 0.0931
108.0 -0.3833 17.5839 0.0933
108.5 -0.3833 17.7668 0.0934
109.0 -0.3833 17.9526 0.0936
109.5 -0.3833 18.1412 0.0938
110.0 -0.3833 18.3324 0.0940

 

 LMS table: Weight-for-length percentiles, males 45 to 110 cm, WHO growth standard

 
Length [cm] Power [L] Median [M] Variation [S]
45.0 -0.3521 2.4410 0.0918
45.5 -0.3521 2.5244 0.0915
46.0 -0.3521 2.6077 0.0912
46.5 -0.3521 2.6913 0.0909
47.0 -0.3521 2.7755 0.0906
47.5 -0.3521 2.8609 0.0904
48.0 -0.3521 2.9480 0.0901
48.5 -0.3521 3.0377 0.0898
49.0 -0.3521 3.1308 0.0895
49.5 -0.3521 3.2276 0.0892
50.0 -0.3521 3.3278 0.0889
50.5 -0.3521 3.4311 0.0886
51.0 -0.3521 3.5376 0.0883
51.5 -0.3521 3.6477 0.0880
52.0 -0.3521 3.7620 0.0877
52.5 -0.3521 3.8814 0.0874
53.0 -0.3521 4.0060 0.0871
53.5 -0.3521 4.1354 0.0868
54.0 -0.3521 4.2693 0.0865
54.5 -0.3521 4.4066 0.0862
55.0 -0.3521 4.5467 0.0859
55.5 -0.3521 4.6892 0.0856
56.0 -0.3521 4.8338 0.0853
56.5 -0.3521 4.9796 0.0851
57.0 -0.3521 5.1259 0.0848
57.5 -0.3521 5.2721 0.0846
58.0 -0.3521 5.4180 0.0843
58.5 -0.3521 5.5632 0.0841
59.0 -0.3521 5.7074 0.0838
59.5 -0.3521 5.8501 0.0836
60.0 -0.3521 5.9907 0.0834
60.5 -0.3521 6.1284 0.0832
61.0 -0.3521 6.2632 0.0831
61.5 -0.3521 6.3954 0.0829
62.0 -0.3521 6.5251 0.0828
62.5 -0.3521 6.6527 0.0827
63.0 -0.3521 6.7786 0.0825
63.5 -0.3521 6.9028 0.0824
64.0 -0.3521 7.0255 0.0824
64.5 -0.3521 7.1467 0.0823
65.0 -0.3521 7.2666 0.0822
65.5 -0.3521 7.3854 0.0822
66.0 -0.3521 7.5034 0.0822
66.5 -0.3521 7.6206 0.0821
67.0 -0.3521 7.7370 0.0821
67.5 -0.3521 7.8526 0.0821
68.0 -0.3521 7.9674 0.0821
68.5 -0.3521 8.0816 0.0822
69.0 -0.3521 8.1955 0.0822
69.5 -0.3521 8.3092 0.0822
70.0 -0.3521 8.4227 0.0823
70.5 -0.3521 8.5358 0.0824
71.0 -0.3521 8.6480 0.0824
71.5 -0.3521 8.7594 0.0825
72.0 -0.3521 8.8697 0.0825
72.5 -0.3521 8.9788 0.0826
73.0 -0.3521 9.0865 0.0827
73.5 -0.3521 9.1927 0.0828
74.0 -0.3521 9.2974 0.0828
74.5 -0.3521 9.4010 0.0829
75.0 -0.3521 9.5032 0.0829
75.5 -0.3521 9.6041 0.0830
76.0 -0.3521 9.7033 0.0831
76.5 -0.3521 9.8007 0.0831
77.0 -0.3521 9.8963 0.0831
77.5 -0.3521 9.9902 0.0832
78.0 -0.3521 10.0827 0.0832
78.5 -0.3521 10.1741 0.0832
79.0 -0.3521 10.2649 0.0832
79.5 -0.3521 10.3558 0.0831
80.0 -0.3521 10.4475 0.0831
80.5 -0.3521 10.5405 0.0830
81.0 -0.3521 10.6352 0.0829
81.5 -0.3521 10.7322 0.0828
82.0 -0.3521 10.8321 0.0827
82.5 -0.3521 10.9350 0.0826
83.0 -0.3521 11.0415 0.0825
83.5 -0.3521 11.1516 0.0823
84.0 -0.3521 11.2651 0.0822
84.5 -0.3521 11.3817 0.0820
85.0 -0.3521 11.5007 0.0818
85.5 -0.3521 11.6218 0.0816
86.0 -0.3521 11.7444 0.0814
86.5 -0.3521 11.8678 0.0813
87.0 -0.3521 11.9916 0.0811
87.5 -0.3521 12.1152 0.0810
88.0 -0.3521 12.2382 0.0808
88.5 -0.3521 12.3603 0.0807
89.0 -0.3521 12.4815 0.0806
89.5 -0.3521 12.6017 0.0805
90.0 -0.3521 12.7209 0.0804
90.5 -0.3521 12.8392 0.0803
91.0 -0.3521 12.9569 0.0803
91.5 -0.3521 13.0742 0.0803
92.0 -0.3521 13.1910 0.0803
92.5 -0.3521 13.3075 0.0803
93.0 -0.3521 13.4239 0.0803
93.5 -0.3521 13.5404 0.0803
94.0 -0.3521 13.6572 0.0803
94.5 -0.3521 13.7746 0.0804
95.0 -0.3521 13.8928 0.0805
95.5 -0.3521 14.0120 0.0806
96.0 -0.3521 14.1325 0.0807
96.5 -0.3521 14.2544 0.0808
97.0 -0.3521 14.3782 0.0809
97.5 -0.3521 14.5038 0.0811
98.0 -0.3521 14.6316 0.0812
98.5 -0.3521 14.7614 0.0814
99.0 -0.3521 14.8934 0.0816
99.5 -0.3521 15.0275 0.0818
100.0 -0.3521 15.1637 0.0820
100.5 -0.3521 15.3018 0.0822
101.0 -0.3521 15.4419 0.0824
101.5 -0.3521 15.5838 0.0827
102.0 -0.3521 15.7276 0.0829
102.5 -0.3521 15.8732 0.0832
103.0 -0.3521 16.0206 0.0834
103.5 -0.3521 16.1697 0.0837
104.0 -0.3521 16.3204 0.0840
104.5 -0.3521 16.4728 0.0843
105.0 -0.3521 16.6268 0.0845
105.5 -0.3521 16.7826 0.0848
106.0 -0.3521 16.9401 0.0851
106.5 -0.3521 17.0995 0.0854
107.0 -0.3521 17.2607 0.0857
107.5 -0.3521 17.4237 0.0860
108.0 -0.3521 17.5885 0.0863
108.5 -0.3521 17.7553 0.0866
109.0 -0.3521 17.9242 0.0869
109.5 -0.3521 18.0954 0.0872
110.0 -0.3521 18.2689 0.0876

 

 LMS table: Normal table percentiles for Z-score

 
Z 1 3 5 7 9
-3.0 0.13% 0.12% 0.11% 0.11% 0.10%
-2.9 0.18% 0.17% 0.16% 0.15% 0.14%
-2.8 0.25% 0.23% 0.22% 0.21% 0.19%
-2.7 0.34% 0.32% 0.30% 0.28% 0.26%
-2.6 0.45% 0.43% 0.40% 0.38% 0.36%
-2.5 0.60% 0.57% 0.54% 0.51% 0.48%
-2.4 0.80% 0.75% 0.71% 0.68% 0.64%
-2.3 1.04% 0.99% 0.94% 0.89% 0.84%
-2.2 1.36% 1.29% 1.22% 1.16% 1.10%
-2.1 1.74% 1.66% 1.58% 1.50% 1.43%
-2.0 2.22% 2.12% 2.02% 1.92% 1.83%
-1.9 2.81% 2.68% 2.56% 2.44% 2.33%
-1.8 3.52% 3.36% 3.22% 3.07% 2.94%
-1.7 4.36% 4.18% 4.01% 3.84% 3.67%
-1.6 5.37% 5.16% 4.95% 4.75% 4.55%
-1.5 6.55% 6.30% 6.06% 5.82% 5.59%
-1.4 7.93% 7.64% 7.35% 7.08% 6.81%
-1.3 9.51% 9.18% 8.85% 8.53% 8.23%
-1.2 11.31% 10.94% 10.57% 10.20% 9.85%
-1.1 13.35% 12.92% 12.51% 12.10% 11.70%
-1.0 15.63% 15.15% 14.69% 14.23% 13.79%
-0.9 18.14% 17.62% 17.11% 16.60% 16.11%
-0.8 20.90% 20.33% 19.77% 19.22% 18.67%
-0.7 23.89% 23.27% 22.66% 22.07% 21.48%
-0.6 27.09% 26.44% 25.79% 25.14% 24.51%
-0.5 30.50% 29.81% 29.12% 28.43% 27.76%
-0.4 34.09% 33.36% 32.64% 31.92% 31.21%
-0.3 37.83% 37.07% 36.32% 35.57% 34.83%
-0.2 41.68% 40.91% 40.13% 39.36% 38.59%
-0.1 45.62% 44.83% 44.04% 43.25% 42.47%
-0.0 49.60% 48.80% 48.01% 47.21% 46.41%
0.0 50.40% 51.20% 51.99% 52.79% 53.59%
0.1 54.38% 55.17% 55.96% 56.75% 57.54%
0.2 58.32% 59.10% 59.87% 60.64% 61.41%
0.3 62.17% 62.93% 63.68% 64.43% 65.17%
0.4 65.91% 66.64% 67.36% 68.08% 68.79%
0.5 69.50% 70.19% 70.88% 71.57% 72.24%
0.6 72.91% 73.57% 74.22% 74.86% 75.49%
0.7 76.12% 76.73% 77.34% 77.94% 78.52%
0.8 79.10% 79.67% 80.23% 80.79% 81.33%
0.9 81.86% 82.38% 82.89% 83.40% 83.89%
1.0 84.38% 84.85% 85.31% 85.77% 86.21%
1.1 86.65% 87.08% 87.49% 87.90% 88.30%
1.2 88.69% 89.07% 89.44% 89.80% 90.15%
1.3 90.49% 90.82% 91.15% 91.47% 91.77%
1.4 92.07% 92.36% 92.65% 92.92% 93.19%
1.5 93.45% 93.70% 93.94% 94.18% 94.41%
1.6 94.63% 94.85% 95.05% 95.25% 95.45%
1.7 95.64% 95.82% 95.99% 96.16% 96.33%
1.8 96.49% 96.64% 96.78% 96.93% 97.06%
1.9 97.19% 97.32% 97.44% 97.56% 97.67%
2.0 97.78% 97.88% 97.98% 98.08% 98.17%
2.1 98.26% 98.34% 98.42% 98.50% 98.57%
2.2 98.65% 98.71% 98.78% 98.84% 98.90%
2.3 98.96% 99.01% 99.06% 99.11% 99.16%
2.4 99.20% 99.25% 99.29% 99.32% 99.36%
2.5 99.40% 99.43% 99.46% 99.49% 99.52%
2.6 99.55% 99.57% 99.60% 99.62% 99.64%
2.7 99.66% 99.68% 99.70% 99.72% 99.74%
2.8 99.75% 99.77% 99.78% 99.80% 99.81%
2.9 99.82% 99.83% 99.84% 99.85% 99.86%
3.0 99.87% 99.88% 99.89% 99.89% 99.90%
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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Topic 15633 Version 13.0