CDC Weight for Age Percentiles for Girls (2-20 years)

 
Input
 
Age  
Weight  

 
Results
 
 
Z Score  
Percentile  
 
Decimal Precision  
 
Notes
  • Weight percentiles are best interpreted with reference to height (see calculators for weight for height and BMI percentiles.)
  • 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.
  • LMS data used in this calculator are shown in the data table below.
  • 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.
  • 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
 
AgeMonths = Age *12
ZScore = ((Weight/M)L - 1) / (L * S)
Percentile = ZtoPercentile(ZScore)

 

 
References
  1. LMS Parameters for Girls: Weight for Age. National health and nutrition survey (NHANES), CDC/National Center for Health Statistics.

 

LMS Parameters for Girls: Weight for Age

 
Age [months] Power [L] Median [M] Variation [S]
24.5 -0.75220657 12.13455523 0.107740345
25.5 -0.78423366 12.2910249 0.10847701
26.5 -0.81409582 12.44469258 0.109280828
27.5 -0.841935504 12.59622335 0.110144488
28.5 -0.867889398 12.74620911 0.111060815
29.5 -0.892102647 12.89517218 0.112022759
30.5 -0.914718817 13.04357164 0.113023467
31.5 -0.935876584 13.19180874 0.114056328
32.5 -0.955723447 13.34022934 0.115114953
33.5 -0.974383363 13.48913319 0.116193327
34.5 -0.991980756 13.63877446 0.11728575
35.5 -1.008640742 13.78936547 0.118386848
36.5 -1.024471278 13.94108332 0.119491669
37.5 -1.039573604 14.09407175 0.120595658
38.5 -1.054039479 14.24844498 0.121694676
39.5 -1.067946784 14.40429169 0.12278503
40.5 -1.081374153 14.56167529 0.1238634
41.5 -1.094381409 14.72064045 0.124926943
42.5 -1.107021613 14.88121352 0.125973221
43.5 -1.119338692 15.04340553 0.127000212
44.5 -1.131367831 15.20721443 0.128006292
45.5 -1.143135936 15.37262729 0.128990225
46.5 -1.15466215 15.53962221 0.129951143
47.5 -1.165958392 15.70817017 0.130888527
48.5 -1.177029925 15.87823668 0.131802186
49.5 -1.187871001 16.04978452 0.132692269
50.5 -1.198484073 16.2227706 0.133559108
51.5 -1.208853947 16.39715363 0.134403386
52.5 -1.218965087 16.57289122 0.13522599
53.5 -1.228798212 16.74994187 0.136028014
54.5 -1.238330855 16.92826587 0.136810739
55.5 -1.247537914 17.10782615 0.137575606
56.5 -1.256392179 17.28858894 0.138324193
57.5 -1.264864846 17.47052444 0.139058192
58.5 -1.272926011 17.65360733 0.139779387
59.5 -1.28054514 17.83781722 0.140489635
60.5 -1.287691525 18.02313904 0.141190842
61.5 -1.294332076 18.20956418 0.141884974
62.5 -1.300441561 18.3970876 0.142573939
63.5 -1.305989011 18.58571243 0.143259709
64.5 -1.310946941 18.77544728 0.143944216
65.5 -1.315289534 18.966307 0.144629359
66.5 -1.318992925 19.15831267 0.14531699
67.5 -1.322035315 19.35149163 0.146008903
68.5 -1.324398133 19.54587708 0.146706813
69.5 -1.326064539 19.74150854 0.147412363
70.5 -1.327020415 19.93843145 0.148127109
71.5 -1.327256387 20.13669623 0.148852482
72.5 -1.326763834 20.33635961 0.149589838
73.5 -1.325538668 20.53748298 0.1503404
74.5 -1.323579654 20.74013277 0.151105277
75.5 -1.320888012 20.94438028 0.151885464
76.5 -1.317468695 21.15030093 0.152681819
77.5 -1.313331446 21.35797332 0.15349505
78.5 -1.308487081 21.56748045 0.154325756
79.5 -1.302948173 21.77890902 0.155174414
80.5 -1.296733913 21.99234686 0.15604132
81.5 -1.289863329 22.20788541 0.156926667
82.5 -1.282358762 22.4256177 0.157830504
83.5 -1.274244931 22.64563824 0.158752743
84.5 -1.265548787 22.86804258 0.159693163
85.5 -1.256299378 23.09292679 0.16065141
86.5 -1.24653066 23.32038549 0.161626956
87.5 -1.236266832 23.55051871 0.162619308
88.5 -1.225551344 23.78341652 0.1636276
89.5 -1.214410914 24.01917703 0.1646511
90.5 -1.202884389 24.25789074 0.165688808
91.5 -1.191007906 24.49964778 0.166739662
92.5 -1.178818621 24.74453536 0.167802495
93.5 -1.166354376 24.99263735 0.168876037
94.5 -1.153653688 25.24403371 0.169958922
95.5 -1.140751404 25.49880264 0.171049756
96.5 -1.127684095 25.7570168 0.172147043
97.5 -1.114490244 26.01874261 0.173249185
98.5 -1.101204848 26.28404312 0.174354569
99.5 -1.087863413 26.55297507 0.175461512
100.5 -1.074500927 26.82558904 0.176568284
101.5 -1.061151213 27.1019295 0.177673124
102.5 -1.047847141 27.38203422 0.178774242
103.5 -1.034620551 27.66593402 0.179869829
104.5 -1.021502197 27.9536524 0.180958063
105.5 -1.008521695 28.24520531 0.182037118
106.5 -0.995707494 28.54060085 0.183105172
107.5 -0.983086844 28.83983907 0.18416041
108.5 -0.970685789 29.14291171 0.185201039
109.5 -0.958529157 29.44980208 0.186225287
110.5 -0.946640568 29.76048479 0.187231416
111.5 -0.935042447 30.0749257 0.188217723
112.5 -0.923756041 30.39308176 0.18918255
113.5 -0.912801445 30.71490093 0.190124286
114.5 -0.902197638 31.0403221 0.191041375
115.5 -0.891962513 31.36927506 0.191932319
116.5 -0.882112919 31.7016805 0.192795682
117.5 -0.872664706 32.03744999 0.193630095
118.5 -0.863632768 32.37648607 0.19443426
119.5 -0.855031092 32.71868225 0.195206948
120.5 -0.846872805 33.06392318 0.195947008
121.5 -0.839170224 33.4120847 0.196653365
122.5 -0.831934903 33.76303402 0.197325023
123.5 -0.825177688 34.1166299 0.197961065
124.5 -0.818908758 34.47272283 0.198560655
125.5 -0.813137675 34.83115524 0.199123037
126.5 -0.807873433 35.19176177 0.199647538
127.5 -0.803122613 35.55437176 0.200133598
128.5 -0.79889771 35.91879976 0.200580618
129.5 -0.795203499 36.28486194 0.200988216
130.5 -0.792047959 36.65236365 0.201356017
131.5 -0.789435274 37.02110818 0.201683791
132.5 -0.787374433 37.39088668 0.201971282
133.5 -0.785870695 37.76148905 0.202218375
134.5 -0.784929893 38.1326991 0.202425006
135.5 -0.784557605 38.50429603 0.202591183
136.5 -0.78475917 38.87605489 0.20271698
137.5 -0.785539703 39.24774707 0.202802535
138.5 -0.786904102 39.61914076 0.202848049
139.5 -0.788858208 39.98999994 0.202853758
140.5 -0.791403051 40.36009244 0.202820053
141.5 -0.794546352 40.72917544 0.202747236
142.5 -0.79829102 41.09701099 0.202635758
143.5 -0.802640891 41.46335907 0.202486098
144.5 -0.807599577 41.82797963 0.202298783
145.5 -0.813170461 42.19063313 0.202074385
146.5 -0.819356692 42.55108107 0.201813521
147.5 -0.826161176 42.90908653 0.201516851
148.5 -0.833586038 43.2644155 0.201185082
149.5 -0.841634949 43.61683402 0.200818928
150.5 -0.850307441 43.9661169 0.200419208
151.5 -0.859607525 44.31203579 0.199986681
152.5 -0.869534339 44.65437319 0.199522233
153.5 -0.880088651 44.99291356 0.199026736
154.5 -0.891270585 45.32744704 0.198501096
155.5 -0.903079458 45.65777013 0.197946255
156.5 -0.915513542 45.98368656 0.197363191
157.5 -0.928569454 46.30500858 0.196752931
158.5 -0.942245864 46.62155183 0.196116472
159.5 -0.956537923 46.93314404 0.19545489
160.5 -0.971440492 47.23962058 0.194769279
161.5 -0.986947308 47.54082604 0.194060758
162.5 -1.003050887 47.83661466 0.193330477
163.5 -1.019742425 48.12685082 0.192579614
164.5 -1.037011698 48.41140938 0.191809374
165.5 -1.054846957 48.69017613 0.191020995
166.5 -1.073234825 48.9630481 0.190215739
167.5 -1.092160195 49.22993391 0.189394901
168.5 -1.111606122 49.49075409 0.188559804
169.5 -1.131553723 49.74544132 0.187711798
170.5 -1.151982079 49.99394068 0.186852266
171.5 -1.172868141 50.23620985 0.185982617
172.5 -1.19418462 50.47222213 0.185104331
173.5 -1.215907492 50.70195581 0.184218803
174.5 -1.238005268 50.92540942 0.183327556
175.5 -1.260445591 51.14259229 0.182432113
176.5 -1.283193626 51.3535268 0.181534018
177.5 -1.306212032 51.55824831 0.180634839
178.5 -1.329460945 51.75680513 0.179736168
179.5 -1.35289798 51.94925841 0.178839614
180.5 -1.376478254 52.13568193 0.177946804
181.5 -1.400154426 52.31616197 0.177059379
182.5 -1.423876772 52.49079703 0.17617899
183.5 -1.447593267 52.65969757 0.175307296
184.5 -1.471249702 52.82298572 0.174445958
185.5 -1.494789826 52.9807949 0.173596636
186.5 -1.518155513 53.13326946 0.172760982
187.5 -1.541286949 53.28056425 0.17194064
188.5 -1.564122852 53.42284417 0.171137232
189.5 -1.586600712 53.5602837 0.170352363
190.5 -1.608657054 53.69306637 0.169587605
191.5 -1.630227728 53.82138422 0.168844497
192.5 -1.651248208 53.94543725 0.168124538
193.5 -1.67165392 54.06543278 0.167429179
194.5 -1.691380583 54.18158486 0.166759816
195.5 -1.710364557 54.29411356 0.166117788
196.5 -1.728543207 54.40324431 0.165504365
197.5 -1.745855274 54.50920717 0.164920747
198.5 -1.762241248 54.61223603 0.164368054
199.5 -1.777643747 54.71256787 0.16384732
200.5 -1.792007891 54.81044184 0.163359491
201.5 -1.805281675 54.90609842 0.162905415
202.5 -1.817416335 54.99977846 0.162485839
203.5 -1.828366707 55.09172217 0.162101402
204.5 -1.838091576 55.18216811 0.161752634
205.5 -1.846554015 55.271352 0.161439944
206.5 -1.853721704 55.35950558 0.161163623
207.5 -1.859567242 55.44685531 0.160923833
208.5 -1.864068443 55.53362107 0.160720609
209.5 -1.86720861 55.62001464 0.16055385
210.5 -1.8689768 55.70623826 0.160423319
211.5 -1.869371157 55.79247939 0.160328578
212.5 -1.868386498 55.87892356 0.160269232
213.5 -1.866033924 55.96573022 0.160244549
214.5 -1.862327775 56.05304601 0.160253714
215.5 -1.857289195 56.14099882 0.160295765
216.5 -1.850946286 56.22969564 0.16036959
217.5 -1.84333425 56.3192203 0.16047393
218.5 -1.834495505 56.40963105 0.160607377
219.5 -1.824479785 56.50095811 0.16076838
220.5 -1.813344222 56.59320107 0.160955249
221.5 -1.801153404 56.68632619 0.161166157
222.5 -1.787979408 56.78026364 0.161399151
223.5 -1.773901816 56.87490465 0.161652158
224.5 -1.759007704 56.97009856 0.161922998
225.5 -1.743391606 57.06564989 0.162209399
226.5 -1.72715546 57.16131528 0.162509006
227.5 -1.710410733 57.25679821 0.162819353
228.5 -1.693267093 57.35175792 0.163138124
229.5 -1.67585442 57.44578172 0.163462715
230.5 -1.658302847 57.53840429 0.163790683
231.5 -1.640747464 57.62910094 0.164119574
232.5 -1.623332891 57.7172758 0.164446997
233.5 -1.606209374 57.80226553 0.164770638
234.5 -1.589533346 57.88333502 0.165088289
235.5 -1.573467222 57.95967458 0.165397881
236.5 -1.558179166 58.0303973 0.165697507
237.5 -1.543846192 58.09453209 0.165985386
238.5 -1.530642461 58.15103575 0.166260109
239.5 -1.518754013 58.1987714 0.16652037

 

Z-score to percentile table

 
Z 0 1 2 3 4 5 6 7 8 9
-3.0 0.13% 0.13% 0.13% 0.12% 0.12% 0.11% 0.11% 0.11% 0.10% 0.10%
-2.9 0.19% 0.18% 0.18% 0.17% 0.16% 0.16% 0.15% 0.15% 0.14% 0.14%
-2.8 0.26% 0.25% 0.24% 0.23% 0.23% 0.22% 0.21% 0.21% 0.20% 0.19%
-2.7 0.35% 0.34% 0.33% 0.32% 0.31% 0.30% 0.29% 0.28% 0.27% 0.26%
-2.6 0.47% 0.45% 0.44% 0.43% 0.41% 0.40% 0.39% 0.38% 0.37% 0.36%
-2.5 0.62% 0.60% 0.59% 0.57% 0.55% 0.54% 0.52% 0.51% 0.49% 0.48%
-2.4 0.82% 0.80% 0.78% 0.75% 0.73% 0.71% 0.70% 0.68% 0.66% 0.64%
-2.3 1.07% 1.04% 1.02% 0.99% 0.96% 0.94% 0.91% 0.89% 0.87% 0.84%
-2.2 1.39% 1.36% 1.32% 1.29% 1.26% 1.22% 1.19% 1.16% 1.13% 1.10%
-2.1 1.79% 1.74% 1.70% 1.66% 1.62% 1.58% 1.54% 1.50% 1.46% 1.43%
-2.0 2.28% 2.22% 2.17% 2.12% 2.07% 2.02% 1.97% 1.92% 1.88% 1.83%
-1.9 2.87% 2.81% 2.74% 2.68% 2.62% 2.56% 2.50% 2.44% 2.39% 2.33%
-1.8 3.59% 3.52% 3.44% 3.36% 3.29% 3.22% 3.14% 3.07% 3.01% 2.94%
-1.7 4.46% 4.36% 4.27% 4.18% 4.09% 4.01% 3.92% 3.84% 3.75% 3.67%
-1.6 5.48% 5.37% 5.26% 5.16% 5.05% 4.95% 4.85% 4.75% 4.65% 4.55%
-1.5 6.68% 6.55% 6.43% 6.30% 6.18% 6.06% 5.94% 5.82% 5.71% 5.59%
-1.4 8.08% 7.93% 7.78% 7.64% 7.49% 7.35% 7.22% 7.08% 6.94% 6.81%
-1.3 9.68% 9.51% 9.34% 9.18% 9.01% 8.85% 8.69% 8.53% 8.38% 8.23%
-1.2 11.51% 11.31% 11.12% 10.94% 10.75% 10.57% 10.38% 10.20% 10.03% 9.85%
-1.1 13.57% 13.35% 13.14% 12.92% 12.71% 12.51% 12.30% 12.10% 11.90% 11.70%
-1.0 15.87% 15.63% 15.39% 15.15% 14.92% 14.69% 14.46% 14.23% 14.01% 13.79%
-0.9 18.41% 18.14% 17.88% 17.62% 17.36% 17.11% 16.85% 16.60% 16.35% 16.11%
-0.8 21.19% 20.90% 20.61% 20.33% 20.05% 19.77% 19.49% 19.22% 18.94% 18.67%
-0.7 24.20% 23.89% 23.58% 23.27% 22.97% 22.66% 22.36% 22.07% 21.77% 21.48%
-0.6 27.43% 27.09% 26.76% 26.44% 26.11% 25.79% 25.46% 25.14% 24.83% 24.51%
-0.5 30.85% 30.50% 30.15% 29.81% 29.46% 29.12% 28.77% 28.43% 28.10% 27.76%
-0.4 34.46% 34.09% 33.72% 33.36% 33.00% 32.64% 32.28% 31.92% 31.56% 31.21%
-0.3 38.21% 37.83% 37.45% 37.07% 36.69% 36.32% 35.94% 35.57% 35.20% 34.83%
-0.2 42.07% 41.68% 41.29% 40.91% 40.52% 40.13% 39.74% 39.36% 38.97% 38.59%
-0.1 46.02% 45.62% 45.22% 44.83% 44.43% 44.04% 43.64% 43.25% 42.86% 42.47%
0.0 50.00% 50.40% 50.80% 51.20% 51.60% 51.99% 52.39% 52.79% 53.19% 53.59%
0.1 53.98% 54.38% 54.78% 55.17% 55.57% 55.96% 56.36% 56.75% 57.14% 57.54%
0.2 57.93% 58.32% 58.71% 59.10% 59.48% 59.87% 60.26% 60.64% 61.03% 61.41%
0.3 61.79% 62.17% 62.55% 62.93% 63.31% 63.68% 64.06% 64.43% 64.80% 65.17%
0.4 65.54% 65.91% 66.28% 66.64% 67.00% 67.36% 67.72% 68.08% 68.44% 68.79%
0.5 69.15% 69.50% 69.85% 70.19% 70.54% 70.88% 71.23% 71.57% 71.90% 72.24%
0.6 72.58% 72.91% 73.24% 73.57% 73.89% 74.22% 74.54% 74.86% 75.18% 75.49%
0.7 75.80% 76.12% 76.42% 76.73% 77.04% 77.34% 77.64% 77.94% 78.23% 78.52%
0.8 78.81% 79.10% 79.39% 79.67% 79.96% 80.23% 80.51% 80.79% 81.06% 81.33%
0.9 81.59% 81.86% 82.12% 82.38% 82.64% 82.89% 83.15% 83.40% 83.65% 83.89%
1.0 84.13% 84.38% 84.61% 84.85% 85.08% 85.31% 85.54% 85.77% 85.99% 86.21%
1.1 86.43% 86.65% 86.86% 87.08% 87.29% 87.49% 87.70% 87.90% 88.10% 88.30%
1.2 88.49% 88.69% 88.88% 89.07% 89.25% 89.44% 89.62% 89.80% 89.97% 90.15%
1.3 90.32% 90.49% 90.66% 90.82% 90.99% 91.15% 91.31% 91.47% 91.62% 91.77%
1.4 91.92% 92.07% 92.22% 92.36% 92.51% 92.65% 92.79% 92.92% 93.06% 93.19%
1.5 93.32% 93.45% 93.57% 93.70% 93.82% 93.94% 94.06% 94.18% 94.30% 94.41%
1.6 94.52% 94.63% 94.74% 94.85% 94.95% 95.05% 95.15% 95.25% 95.35% 95.45%
1.7 95.54% 95.64% 95.73% 95.82% 95.91% 95.99% 96.08% 96.16% 96.25% 96.33%
1.8 96.41% 96.49% 96.56% 96.64% 96.71% 96.78% 96.86% 96.93% 97.00% 97.06%
1.9 97.13% 97.19% 97.26% 97.32% 97.38% 97.44% 97.50% 97.56% 97.62% 97.67%
2.0 97.73% 97.78% 97.83% 97.88% 97.93% 97.98% 98.03% 98.08% 98.12% 98.17%
2.1 98.21% 98.26% 98.30% 98.34% 98.38% 98.42% 98.46% 98.50% 98.54% 98.57%
2.2 98.61% 98.65% 98.68% 98.71% 98.75% 98.78% 98.81% 98.84% 98.87% 98.90%
2.3 98.93% 98.96% 98.98% 99.01% 99.04% 99.06% 99.09% 99.11% 99.13% 99.16%
2.4 99.18% 99.20% 99.22% 99.25% 99.27% 99.29% 99.31% 99.32% 99.34% 99.36%
2.5 99.38% 99.40% 99.41% 99.43% 99.45% 99.46% 99.48% 99.49% 99.51% 99.52%
2.6 99.53% 99.55% 99.56% 99.57% 99.59% 99.60% 99.61% 99.62% 99.63% 99.64%
2.7 99.65% 99.66% 99.67% 99.68% 99.69% 99.70% 99.71% 99.72% 99.73% 99.74%
2.8 99.74% 99.75% 99.76% 99.77% 99.77% 99.78% 99.79% 99.80% 99.80% 99.81%
2.9 99.81% 99.82% 99.83% 99.83% 99.84% 99.84% 99.85% 99.85% 99.86% 99.86%
3.0 99.87% 99.87% 99.87% 99.88% 99.88% 99.89% 99.89% 99.89% 99.90% 99.90%

 

 
 
Legal Notices and Disclaimer

 
All information contained in and produced by the EBMcalc system is provided for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease. THIS INFORMATION IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER. Click here for full notice and disclaimer.
 
EBMcalc is Copyright © 1998-2020 Foundation Internet Services    [Build 261279 v20.3]