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Health
U.S. Weight Range (lb)
Boys, Birth - 14 Years
Average
Birth7.4
5.7-9.3
Month19.8
7.8-12.2
Month212.2
9.9-15.0
Month314.0
11.5-17.0
Month415.4
12.8-18.5
Month516.5
13.7-19.8
Month617.5
14.5-20.9
Month7-819.0
15.2-23.4
Month10-1421.2
16.8-26.6
Month15-1923.6
18.9-29.4
Month20-2425.9
20.8-32.3
Year2-2.528.3
23.4-35.6
Year2.5-3.531.4
25.1-39.9
Year3.5-4.534.8
27.7-45.2
Year4.5-538.2
30.5-50.5
Year542.3
33.2-57.5
Year647.0
36.6-65.0
Year751.9
40.2-73.4
Year857.2
44.0-83.0
Year963.1
48.0-93.9
Year1069.9
52.4-106.1
Year1177.8
57.1-119.3
Year1286.8
62.6-133.0
Year1396.9
69.1-146.7
Year14107.7
76.8-159.9
U.S. Weight Range (lb)
Girls, Birth - 14 Years
Average
Birth7.1
5.6-8.9
Month19.2
7.3-11.5
Month211.3
9.1-13.9
Month312.9
10.4-15.8
Month414.1
11.5-17.3
Month515.2
12.4-18.6
Month616.1
13.2-19.7
Month7-817.5
13.8-22.2
Month10-1419.7
15.3-25.4
Month15-1922.0
17.3-28.3
Month20-2424.3
19.2-31.2
Year2-2.527.0
22.5-34.7
Year2.5-3.530.3
24.2-39.8
Year3.5-4.533.8
26.6-45.5
Year4.5-537.2
29.4-51.0
Year541.3
32.1-58.2
Year646.1
35.5-66.1
Year751.3
39.1-75.1
Year857.2
42.9-85.6
Year964.1
47.0-97.7
Year1072.0
51.8-110.9
Year1180.6
57.3-124.6
Year1289.6
63.6-137.9
Year1398.2
70.4-149.7
Year14105.9
77.4-159.3
Last Updated: 2/10/2019
References: https://www.cdc.gov/growthcharts/index.htm