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Data Table of Infant Head Circumference-for-age Charts

Males, Birth - 36 Months
Age (in months)3rd Percentile Head Circumference (in centimeters)5th Percentile Head Circumference (in centimeters)10th Percentile Head Circumference (in centimeters)25th Percentile Head Circumference (in centimeters)50th Percentile Head Circumference (in centimeters)75th Percentile Head Circumference (in centimeters)90th Percentile Head Circumference (in centimeters)95th Percentile Head Circumference (in centimeters)97th Percentile Head Circumference (in centimeters)
031.4876232.1488133.0838934.4695235.8136737.0042637.9737938.5157438.85417
0.533.2500633.8339234.6725335.9398737.1936138.3212539.2498939.7726240.10028
1.535.7812636.2642836.9737738.0787839.2074340.2498741.1260541.6258141.94138
2.537.558837.9795938.6072439.6063740.6523341.6396842.4843642.9718943.28181
3.538.8994439.2789339.8512340.7771341.7651742.7145543.5390244.0198444.32733
4.539.9567340.3076640.8411441.7148342.6611643.5835844.3947244.8719745.17877
5.540.8164241.1471441.6529142.4888943.4048944.3080145.1103445.5859345.893
6.541.5310941.8474242.333343.1420444.036144.9255545.7222546.1973646.50524
7.542.1352142.4413442.9131143.7024544.5809745.4610446.2544346.7298347.0388
8.542.6525342.9516243.4136544.1896445.0576145.9316646.7234947.199747.5099
9.543.1000943.3945843.8502544.6176445.4790846.3497947.1414247.618847.93027
10.543.4904943.782344.2343244.9969445.8550646.7246347.5171447.9959248.30867
11.543.8333244.1239944.5745445.3354946.1929547.0631847.8574448.3378148.65181
12.544.13644.4267944.8776745.6395246.4985347.3709148.1676348.6497248.96494
13.544.4044144.6963945.1490845.9139846.7763847.6521448.4519148.9358449.25225
14.544.6432844.9373345.393146.1628447.0301847.9103848.7137149.1995549.51712
15.544.8564645.1533345.6132546.3893747.2629548.1484848.9557849.4436249.76233
16.545.0471245.3474645.8124546.5962647.4772148.3688149.1804549.6703449.99018
17.545.217945.5222945.9931546.7857847.6750448.5733649.3896349.8816650.20261
18.545.3710445.6799746.1573946.9598147.8582148.7637949.5849750.0791950.40125
19.545.5084345.8223446.3069247.1199948.0282248.9415349.7678650.2643250.58751
20.545.6316945.9509646.4432547.2676948.1863749.1078149.9394850.4382550.76259
21.545.7422146.0671946.5676747.4041348.3337749.263750.1008950.6020350.92752
22.545.8412146.1722146.6812947.5303548.471449.410150.2529850.7565451.08322
23.545.9297446.2670446.7851147.6472448.6001149.5478450.3965550.9025851.23047
24.546.0087246.3525946.8799747.7556348.7206549.6776250.5322951.0408551.36998
25.546.0789846.4296346.9666347.8562148.8336749.8000850.6608251.1719651.50236
26.546.1412446.4988947.0457847.9496248.9397649.9157850.7826951.2964751.62817
27.546.1961446.5609847.1180148.036449.0394550.0252150.8983951.4148551.7479
28.546.2442546.6164647.1838548.1170749.1332150.1288351.0083651.5275651.86198
29.546.286146.6658347.2437948.1920649.2214650.2270551.11351.6349951.97081
30.546.3221446.7095447.2982448.2617849.3045850.3202351.2126851.7374952.07475
31.546.352846.7480147.3476148.326649.3829250.4086951.307751.8353952.17413
32.546.3784446.7815947.3922548.3868449.4567850.4927551.3983751.9289852.26923
33.546.3994246.8106147.4324748.4428149.5264550.5726751.4849652.0185352.36032
34.546.4160546.835447.4685748.4947949.5921850.648751.5677152.1042952.44764
35.546.428646.8562147.5008148.5430149.6542350.7210851.6468652.1864652.53143
3646.4334446.8652147.5155648.5657849.6839450.7559751.6851452.2262852.57205
Females, Birth - 36 Months
Age (in months)3rd Percentile Head Circumference (in centimeters)5th Percentile Head Circumference (in centimeters)10th Percentile Head Circumference (in centimeters)25th Percentile Head Circumference (in centimeters)50th Percentile Head Circumference (in centimeters)75th Percentile Head Circumference (in centimeters)90th Percentile Head Circumference (in centimeters)95th Percentile Head Circumference (in centimeters)97th Percentile Head Circumference (in centimeters)
031.930232.250932.7594933.6518734.7115635.8512436.953537.6513838.1211
0.533.3807133.6874434.1734635.0250836.0345437.1180738.1640538.8253539.27006
1.535.4862735.775636.2332637.0328237.9767238.9853339.9545940.5651740.97482
2.536.985537.2652237.7068538.4760339.3801340.3414541.2606341.8373242.22321
3.538.1311438.4056138.8381439.5890540.4677441.3973242.2815342.8339643.2026
4.539.0461939.3181439.7458840.4861141.3484142.2560443.1148943.6492444.00486
5.539.799640.0708640.4967241.2313642.0833542.9756643.8157544.336344.68183
6.540.4337940.7056741.1317141.8643542.7103443.5920744.4181544.9280345.26563
7.540.9767241.2501641.6778742.4111343.2542944.1289744.9446145.4461945.77751
8.541.4476841.723442.1539142.8897843.732544.6028245.4107845.9059146.23224
9.541.8605842.1391342.573343.3132944.1574345.025545.8279946.3181546.64053
10.542.2257542.5075542.9460443.6913544.5383745.4058746.2046646.6910647.01035
11.542.5510542.8364343.2797744.0313344.8824145.7507246.5472647.030947.3478
12.542.842643.1318243.5804344.3389945.1950846.0653246.8608447.3425547.65766
13.543.1052643.3985343.8527444.6189145.4807846.353947.1494247.6299147.94373
14.543.3429443.6404244.100544.8747645.7430846.6198647.4162447.8961348.20911
15.543.5588343.8606644.3268245.1095945.9848746.8659947.6639948.143848.4563
16.543.7555844.0618644.5342845.3258746.2085847.094647.8948748.3750548.68741
17.543.9353944.246244.7250145.525746.4162247.3076548.1107448.591748.90419
18.544.1001344.4155344.9008545.7108646.609547.5067648.3131748.7952649.10814
19.544.2513744.5714245.0633345.8828446.7898947.6933548.5035148.9870349.30052
20.544.3904744.7152145.2137846.0429546.9586347.8686148.682949.1681449.48244
21.544.5186144.8480645.3533446.1922947.1168148.033648.8523649.3395549.65484
22.544.636844.9709945.4830146.3318447.2653848.1892349.0127649.5021149.81854
23.544.7459345.0848745.6036746.4624647.4051648.3362949.1648649.6565749.97429
24.544.8467845.1904745.7160846.5848947.5368848.4754849.3093349.8035850.12271
25.544.9400545.288545.8209246.699847.6611848.6074349.4467749.9437350.26437
26.545.0263445.3795445.9187846.8077847.7786548.732749.5777350.0775150.39978
27.545.106245.4641546.0102146.9093547.8897948.8517849.7026650.2054150.5294
28.545.1801145.542846.0956847.0049947.9950648.965149.82250.3278350.65362
29.545.2485245.6159446.1756247.0951148.0948849.0730849.9361350.4451450.77281
30.545.3118145.6839446.2504347.1800948.1896149.1760750.045450.5576950.88731
31.545.3703545.7471846.3204447.260348.279649.274450.1501250.6657850.99741
32.545.4244445.8059646.3859947.3360348.3651549.3683650.2505850.7696851.10338
33.545.474445.8605846.4473647.4075748.4465449.4582350.3470450.8696551.20547
34.545.5204745.911346.5048147.4751848.5240249.5442550.4397450.9659351.30392
35.545.5629145.9583746.5585947.5391148.5978349.6266550.5288951.0587251.39892
3645.5828445.9806146.5841747.5697648.6334249.6665650.572251.1038751.44519
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