Data Table of Infant Weight-for-age Charts
Males, Birth – 36 Months
| Age (in months) |
3rd Percentile Weight (in kilograms) |
5th Percentile Weight (in kilograms) |
10th Percentile Weight (in kilograms) |
25th Percentile Weight (in kilograms) |
50th Percentile Weight (in kilograms) |
75th Percentile Weight (in kilograms) |
90th Percentile Weight (in kilograms) |
95th Percentile Weight (in kilograms) |
97th Percentile Weight (in kilograms) |
| 0 |
2.355451 |
2.526904 |
2.773802 |
3.150611 |
3.530203 |
3.879077 |
4.172493 |
4.340293 |
4.446488 |
| 0.5 |
2.799549 |
2.964656 |
3.20951 |
3.597396 |
4.003106 |
4.387423 |
4.718161 |
4.91013 |
5.032625 |
| 1.5 |
3.614688 |
3.774849 |
4.020561 |
4.428873 |
4.879525 |
5.327328 |
5.728153 |
5.967102 |
6.121929 |
| 2.5 |
4.342341 |
4.503255 |
4.754479 |
5.183378 |
5.672889 |
6.175598 |
6.638979 |
6.921119 |
7.10625 |
| 3.5 |
4.992898 |
5.157412 |
5.416803 |
5.866806 |
6.391392 |
6.942217 |
7.460702 |
7.781401 |
7.993878 |
| 4.5 |
5.575169 |
5.744752 |
6.013716 |
6.484969 |
7.041836 |
7.635323 |
8.202193 |
8.556813 |
8.793444 |
| 5.5 |
6.096775 |
6.272175 |
6.551379 |
7.043627 |
7.630425 |
8.262033 |
8.871384 |
9.255615 |
9.513307 |
| 6.5 |
6.56443 |
6.745993 |
7.035656 |
7.548346 |
8.162951 |
8.828786 |
9.475466 |
9.885436 |
10.16135 |
| 7.5 |
6.984123 |
7.171952 |
7.472021 |
8.004399 |
8.644832 |
9.34149 |
10.02101 |
10.45331 |
10.74492 |
| 8.5 |
7.361236 |
7.555287 |
7.865533 |
8.416719 |
9.08112 |
9.805593 |
10.51406 |
10.96574 |
11.27084 |
| 9.5 |
7.700624 |
7.900755 |
8.220839 |
8.789882 |
9.4765 |
10.22612 |
10.96017 |
11.42868 |
11.74538 |
| 10.5 |
8.006677 |
8.212684 |
8.542195 |
9.12811 |
9.835308 |
10.60772 |
11.36445 |
11.84763 |
12.17436 |
| 11.5 |
8.283365 |
8.495 |
8.833486 |
9.435279 |
10.16154 |
10.95466 |
11.7316 |
12.22766 |
12.56308 |
| 12.5 |
8.534275 |
8.751264 |
9.098246 |
9.714942 |
10.45885 |
11.27087 |
12.06595 |
12.5734 |
12.91645 |
| 13.5 |
8.762649 |
8.984701 |
9.339688 |
9.970338 |
10.73063 |
11.55996 |
12.37145 |
12.88911 |
13.23893 |
| 14.5 |
8.971407 |
9.198222 |
9.560722 |
10.20442 |
10.97992 |
11.82524 |
12.65175 |
13.17867 |
13.53462 |
| 15.5 |
9.16318 |
9.394454 |
9.763982 |
10.41986 |
11.20956 |
12.06973 |
12.91015 |
13.44564 |
13.80724 |
| 16.5 |
9.340328 |
9.575757 |
9.95184 |
10.6191 |
11.42207 |
12.29617 |
13.14969 |
13.69325 |
14.06019 |
| 17.5 |
9.504964 |
9.744251 |
10.12643 |
10.80433 |
11.61978 |
12.50708 |
13.37311 |
13.92444 |
14.29655 |
| 18.5 |
9.658975 |
9.90183 |
10.28968 |
10.97753 |
11.80478 |
12.70473 |
13.5829 |
14.14187 |
14.51909 |
| 19.5 |
9.804039 |
10.05019 |
10.4433 |
11.14047 |
11.97897 |
12.89117 |
13.78133 |
14.34795 |
14.73034 |
| 20.5 |
9.941645 |
10.19082 |
10.58881 |
11.29477 |
12.14404 |
13.06825 |
13.97042 |
14.54484 |
14.93256 |
| 21.5 |
10.07311 |
10.32507 |
10.72759 |
11.44185 |
12.30154 |
13.23765 |
14.15201 |
14.73448 |
15.12777 |
| 22.5 |
10.19957 |
10.4541 |
10.86084 |
11.58298 |
12.45283 |
13.40086 |
14.32772 |
14.91861 |
15.31777 |
| 23.5 |
10.32206 |
10.57895 |
10.98963 |
11.7193 |
12.59913 |
13.5592 |
14.499 |
15.09876 |
15.50418 |
| 24.5 |
10.44144 |
10.70051 |
11.1149 |
11.85182 |
12.74154 |
13.71386 |
14.66716 |
15.2763 |
15.68841 |
| 25.5 |
10.55847 |
10.81958 |
11.23747 |
11.98142 |
12.88102 |
13.8659 |
14.83332 |
15.45242 |
15.8717 |
| 26.5 |
10.6738 |
10.93681 |
11.35806 |
12.10889 |
13.01842 |
14.01623 |
14.99848 |
15.62819 |
16.05514 |
| 27.5 |
10.78798 |
11.0528 |
11.47728 |
12.23491 |
13.1545 |
14.16567 |
15.16351 |
15.8045 |
16.23967 |
| 28.5 |
10.90147 |
11.16803 |
11.59567 |
12.36007 |
13.2899 |
14.31493 |
15.32917 |
15.98214 |
16.42609 |
| 29.5 |
11.01466 |
11.28293 |
11.71368 |
12.4849 |
13.42519 |
14.46462 |
15.4961 |
16.16177 |
16.61508 |
| 30.5 |
11.12787 |
11.39782 |
11.8317 |
12.60983 |
13.56088 |
14.61527 |
15.66485 |
16.34395 |
16.8072 |
| 31.5 |
11.24135 |
11.513 |
11.95005 |
12.73523 |
13.69738 |
14.76732 |
15.83588 |
16.52915 |
17.00291 |
| 32.5 |
11.3553 |
11.62869 |
12.069 |
12.86144 |
13.83505 |
14.92117 |
16.00958 |
16.71773 |
17.2026 |
| 33.5 |
11.46988 |
11.74508 |
12.18875 |
12.9887 |
13.97418 |
15.07711 |
16.18624 |
16.91 |
17.40654 |
| 34.5 |
11.58521 |
11.8623 |
12.30948 |
13.11723 |
14.11503 |
15.23541 |
16.36612 |
17.10619 |
17.61495 |
| 35.5 |
11.70137 |
11.98046 |
12.43132 |
13.24721 |
14.2578 |
15.39628 |
16.5494 |
17.30646 |
17.82797 |
| 36 |
11.75978 |
12.03991 |
12.49268 |
13.31278 |
14.32994 |
15.47772 |
16.64237 |
17.40816 |
17.93625 |
Females, Birth – 36 Months
| Age (in months) |
3rd Percentile Weight (in kilograms) |
5th Percentile Weight (in kilograms) |
10th Percentile Weight (in kilograms) |
25th Percentile Weight (in kilograms) |
50th Percentile Weight (in kilograms) |
75th Percentile Weight (in kilograms) |
90th Percentile Weight (in kilograms) |
95th Percentile Weight (in kilograms) |
97th Percentile Weight (in kilograms) |
| 0 |
2.414112 |
2.547905 |
2.747222 |
3.064865 |
3.399186 |
3.717519 |
3.992572 |
4.152637 |
4.254922 |
| 0.5 |
2.756917 |
2.894442 |
3.101767 |
3.437628 |
3.797528 |
4.145594 |
4.450126 |
4.628836 |
4.743582 |
| 1.5 |
3.402293 |
3.54761 |
3.770157 |
4.138994 |
4.544777 |
4.946766 |
5.305632 |
5.519169 |
5.657379 |
| 2.5 |
3.997806 |
4.150639 |
4.387042 |
4.78482 |
5.230584 |
5.680083 |
6.087641 |
6.332837 |
6.492574 |
| 3.5 |
4.547383 |
4.707123 |
4.955926 |
5.379141 |
5.859961 |
6.351512 |
6.80277 |
7.076723 |
7.256166 |
| 4.5 |
5.054539 |
5.220488 |
5.480295 |
5.925888 |
6.437588 |
6.966524 |
7.457119 |
7.757234 |
7.95473 |
| 5.5 |
5.5225 |
5.693974 |
5.96351 |
6.428828 |
6.96785 |
7.53018 |
8.056331 |
8.38033 |
8.594413 |
| 6.5 |
5.954272 |
6.130641 |
6.408775 |
6.891533 |
7.454854 |
8.047178 |
8.605636 |
8.951544 |
9.180938 |
| 7.5 |
6.352668 |
6.533373 |
6.819122 |
7.317373 |
7.902436 |
8.521877 |
9.109878 |
9.476009 |
9.719621 |
| 8.5 |
6.720328 |
6.904886 |
7.197414 |
7.709516 |
8.314178 |
8.958324 |
9.573546 |
9.95848 |
10.21539 |
| 9.5 |
7.059732 |
7.247736 |
7.546342 |
8.070932 |
8.693418 |
9.360271 |
10.00079 |
10.40335 |
10.6728 |
| 10.5 |
7.373212 |
7.564327 |
7.868436 |
8.4044 |
9.043262 |
9.731193 |
10.39545 |
10.8147 |
11.09607 |
| 11.5 |
7.662959 |
7.856916 |
8.166069 |
8.712513 |
9.366594 |
10.07431 |
10.76106 |
11.19625 |
11.48908 |
| 12.5 |
7.93103 |
8.127621 |
8.44146 |
8.997692 |
9.666089 |
10.39258 |
11.10089 |
11.55145 |
11.85539 |
| 13.5 |
8.179356 |
8.378425 |
8.696684 |
9.262185 |
9.944226 |
10.68874 |
11.41792 |
11.88348 |
12.19829 |
| 14.5 |
8.409744 |
8.611186 |
8.93368 |
9.508085 |
10.20329 |
10.96532 |
11.71491 |
12.19522 |
12.52078 |
| 15.5 |
8.623887 |
8.827638 |
9.154251 |
9.737329 |
10.44541 |
11.22463 |
11.99438 |
12.48934 |
12.82561 |
| 16.5 |
8.82337 |
9.029399 |
9.360079 |
9.951715 |
10.67251 |
11.46878 |
12.25862 |
12.76825 |
13.11527 |
| 17.5 |
9.009668 |
9.21798 |
9.552723 |
10.1529 |
10.88639 |
11.69972 |
12.50974 |
13.03415 |
13.39204 |
| 18.5 |
9.18416 |
9.394782 |
9.73363 |
10.34241 |
11.08868 |
11.91921 |
12.74964 |
13.28904 |
13.65799 |
| 19.5 |
9.348127 |
9.56111 |
9.90414 |
10.52167 |
11.2809 |
12.12887 |
12.98004 |
13.53473 |
13.91497 |
| 20.5 |
9.50276 |
9.71817 |
10.06549 |
10.69196 |
11.4644 |
12.33016 |
13.2025 |
13.77284 |
14.16467 |
| 21.5 |
9.649162 |
9.867081 |
10.21882 |
10.85446 |
11.64043 |
12.52439 |
13.41844 |
14.00484 |
14.40858 |
| 22.5 |
9.788355 |
10.00887 |
10.36518 |
11.01027 |
11.81014 |
12.71277 |
13.62911 |
14.23205 |
14.64807 |
| 23.5 |
9.921281 |
10.1445 |
10.50553 |
11.16037 |
11.97454 |
12.89636 |
13.83564 |
14.45561 |
14.88432 |
| 24.5 |
10.04881 |
10.27483 |
10.64076 |
11.30567 |
12.13456 |
13.07613 |
14.03902 |
14.67659 |
15.11839 |
| 25.5 |
10.17173 |
10.40066 |
10.77167 |
11.44697 |
12.29102 |
13.25293 |
14.24017 |
14.89587 |
15.35122 |
| 26.5 |
10.29079 |
10.52274 |
10.89899 |
11.58501 |
12.44469 |
13.42753 |
14.43984 |
15.11428 |
15.58363 |
| 27.5 |
10.40664 |
10.64171 |
11.02338 |
11.72047 |
12.59622 |
13.60059 |
14.63873 |
15.33249 |
15.81632 |
| 28.5 |
10.5199 |
10.75819 |
11.14545 |
11.85392 |
12.74621 |
13.77271 |
14.83743 |
15.55113 |
16.0499 |
| 29.5 |
10.63112 |
10.87273 |
11.26575 |
11.98592 |
12.89517 |
13.9444 |
15.03646 |
15.7707 |
16.28491 |
| 30.5 |
10.74078 |
10.98581 |
11.38474 |
12.11692 |
13.04357 |
14.11611 |
15.23626 |
15.99164 |
16.52176 |
| 31.5 |
10.84935 |
11.09789 |
11.50288 |
12.24735 |
13.19181 |
14.28822 |
15.43719 |
16.21432 |
16.76085 |
| 32.5 |
10.95722 |
11.20934 |
11.62054 |
12.37757 |
13.34023 |
14.46106 |
15.63957 |
16.43904 |
17.00245 |
| 33.5 |
11.06475 |
11.32054 |
11.73806 |
12.50791 |
13.48913 |
14.63491 |
15.84365 |
16.66605 |
17.24681 |
| 34.5 |
11.17225 |
11.43177 |
11.85574 |
12.63865 |
13.63877 |
14.80998 |
16.04963 |
16.89553 |
17.49412 |
| 35.5 |
11.28 |
11.54332 |
11.97384 |
12.77001 |
13.78937 |
14.98647 |
16.25767 |
17.12762 |
17.7445 |
| 36 |
11.33404 |
11.59929 |
12.03312 |
12.836 |
13.86507 |
15.07529 |
16.3625 |
17.24469 |
17.87089 |
- Page last reviewed: August 23, 2001
- Page last updated: August 24, 2001
- Content source:
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