fetal to 8 years childs size weight and growth timeline

Fetal length and weight
Estational age	Length (US)	Weight (US)	Length (cm)	Mass (g)
	(crown to rump)		(crown to rump)
8 weeks	0.63 inch	0.04 ounce	1.6 cm	1 gram
9 weeks	0.90 inch	0.07 ounce	2.3 cm	2 grams
10 weeks	1.22 inch	0.14 ounce	3.1 cm	4 grams
11 weeks	1.61 inch	0.25 ounce	4.1 cm	7 grams
12 weeks	2.13 inches	0.49 ounce	5.4 cm	14 grams
13 weeks	2.91 inches	0.81 ounce	7.4 cm	23 grams
14 weeks	3.42 inches	1.52 ounce	8.7 cm	43 grams
15 weeks	3.98 inches	2.47 ounces	10.1 cm	70 grams
16 weeks	4.57 inches	3.53 ounces	11.6 cm	100 grams
17 weeks	5.12 inches	4.94 ounces	13 cm	140 grams
18 weeks	5.59 inches	6.70 ounces	14.2 cm	190 grams
19 weeks	6.02 inches	8.47 ounces	15.3 cm	240 grams
20 weeks	6.46 inches	10.58 ounces	16.4 cm	300 grams
	(crown to heel)		(crown to heel)
20 weeks	10.08 inches	10.58 ounces	25.6 cm	300 grams
21 weeks	10.51 inches	12.70 ounces	26.7 cm	360 grams
22 weeks	10.94 inches	15.17 ounces	27.8 cm	430 grams
23 weeks	11.38 inches	1.10 pound	28.9 cm	501 grams
24 weeks	11.81 inches	1.32 pound	30 cm	600 grams
25 weeks	13.62 inches	1.46 pound	34.6 cm	660 grams
26 weeks	14.02 inches	1.68 pound	35.6 cm	760 grams
27 weeks	14.41 inches	1.93 pound	36.6 cm	875 grams
28 weeks	14.80 inches	2.22 pounds	37.6 cm	1005 grams
29 weeks	15.2 inches	2.54 pounds	38.6 cm	1153 grams
30 weeks	15.71 inches	2.91 pounds	39.9 cm	1319 grams
31 weeks	16.18 inches	3.31 pounds	41.1 cm	1502 grams
32 weeks	16.69 inches	3.75 pounds	42.4 cm	1702 grams
33 weeks	17.20 inches	4.23 pounds	43.7 cm	1918 grams
34 weeks	17.72 inches	4.73 pounds	45 cm	2146 grams
35 weeks	18.19 inches	5.25 pounds	46.2 cm	2383 grams
36 weeks	18.66 inches	5.78 pounds	47.4 cm	2622 grams
37 weeks	19.13 inches	6.30 pounds	48.6 cm	2859 grams
38 weeks	19.61 inches	6.80 pounds	49.8 cm	3083 grams
39 weeks	19.96 inches	7.25 pounds	50.7 cm	3288 grams
40 weeks	20.16 inches	7.63 pounds	51.2 cm	3462 grams
41 weeks	20.35 inches	7.93 pounds	51.7 cm	3597 grams
42 weeks	20.28 inches	8.12 pounds	51.5 cm	3685 grams

Baby size and growth timeline
Birth	Boys Girls Weight 6.7 - 8.1 pounds 6.5 - 7.8 pounds Length 19.1 - 20.1 inches 18.9 - 19.8 inches
3 months	Boys Girls Weight 13.0 - 15.2 pounds 11.8 - 14.0 pounds Length 23.6 - 24.7 inches 23.0 - 24.1 inches

6 months	Boys Girls Weight 16.2 - 18.8 pounds 14.8 - 17.5 pounds Length 26.1 - 27.2 inches 25.3 - 26.5 inches
	Fast fact: By age 6 months, most babies have doubled their birth weight.
9 months	Boys Girls Weight 18.2 - 21.1 pounds 16.7 - 19.7 pounds Length 27.7 - 28.9 inches 27.0 - 28.3 inches

Toddler size and growth timeline
12 months	Boys Girls Weight 19.8 - 22.9 pounds 18.2 - 21.4 pounds Height 29.2 - 30.5 inches 28.5 - 29.8 inches
15 months	Boys Girls Weight 21.1  - 24.5 pounds 19.5 - 23.0 pounds Height 30.5 - 31.8 inches 29.9 - 31.2 inches
18 months	Boys Girls Weight 22.4 - 26.0 pounds 20.8 - 24.5 pounds Height 31.7 - 33.1 inches 31.0 - 32.5 inches
21 months	Boys Girls Weight 23.6 - 27.5 pounds 22.0 - 26.0 pounds Height 32.7 - 34.3 inches 32.1 - 33.8 inches

Preschooler size and growth timeline
24 months	Boys Girls Weight 24.8 - 28.9 pounds 23.3 - 27.5 pounds Height 33.8 - 35.4 inches 33.2 - 34.9 inches
27 months	Boys Girls Weight 27.0 - 31.2 pounds 25.8 - 30.0 pounds Height 34.1 - 36.1 inches 33.7 - 35.6 inches
30 months	Boys Girls Weight 27.8 - 32.2 pounds 26.7 - 31.1 pounds Height 35.0 - 37.0 inches 34.6 - 36.6 inches
33 months	Boys Girls Weight 28.6 - 33.2 pounds 27.6 - 32.3 pounds Height 35.8 - 37.8 inches 35.4 - 37.4 inches
36 months	Boys Girls Weight 29.5 - 34.3 pounds 28.4 - 33.4 pounds Height 36.5 - 38.6 inches 36.0 - 38.1 inches
4 years	Boys Girls Weight 33.3 - 39.1 pounds 32.2 - 38.5 pounds Height 39.2 - 41.5 inches 38.6 - 41.0 inches

Big Kid size and growth timeline
5 years	Boys Girls Weight 37.5 - 44.7 pounds 36.3 - 44.0 pounds Height 41.7 - 44.2 inches 41.3 - 43.8 inches
6 years	Boys Girls Weight 41.9 - 50.6 pounds 40.8 - 50.0 pounds Height 44.2 - 46.9 inches 43.9 - 46.7 inches
7 years	Boys Girls Weight 46.5 - 56.8 pounds 45.6 - 56.6 pounds Height 46.6 - 49.5 inches 46.5 - 49.4 inches
8 years	Boys Girls Weight 51.5 - 63.6 pounds 50.9 - 64.3 pounds Height 48.9 - 52.0 inches 48.8 - 51.9 inches

Your child's size and growth timeline by Michael Rocco Soave