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Calculator: CDC weight for age percentiles for females (2 to 20 years)


Calculator: CDC weight for age percentiles for females (2 to 20 years)

 
Input
 
Age  
Weight  

 
Results
 
Important: Inputs must be complete to perform calculation.

 
 
Z-score  
Percentile  
 
Decimal precision  

 
 

 
Notes
  • Weight percentiles are best interpreted with reference to height (see calculators for Body Mass Index).
  • This calculator uses the growth reference from the Centers for Disease Control and National Center for Health Statistics (CDC/NCHS). The results will be slightly different from calculators or charts that use the growth standards from the World Health Organization (WHO) or International Obesity Task Force (IOTF).
  • 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.
  • The accuracy of the calculation can be assessed by viewing the graph of weight-for-age percentiles for this sex and age group in UpToDate.
  • 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
 
Age_Months = Age *12
Z-score = ((Weight/M)L - 1) / (L * S)
Percentile = ZtoPercentile(Z-score)

 

 

LMS table: Weight-for-age percentiles, girls, 2 to 20 years, CDC growth charts: United States

 
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

 

LMS table: Normal table percentiles for Z-score

 
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%
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 89889 Version 9.0