Height and weight measurements for boys and girls

	Height by percentiles	Weight by percentiles
	5	50	95	5	50	95
Age*	cm	inches	cm	inches	cm	inches	kg	lb	kg	lb	kg	lb

Boys

Birth	46.4	18¼	50.5	20	54.4	21½	2.54	5½	3.27	7¼	4.15	9¼
Birth	46.4	18¼	50.5	20	54.4	21½	2.54	5½	3.27	7¼	4.15	9¼
3 months	56.7	22¼	61.1	24	65.4	25¾	4.43	9¾	5.98	13¼	7.37	16¼
6 months	63.4	25	67.8	26¾	72.3	28½	6.20	13¾	7.85	17¼	9.46	20¾
9 months	68.0	26¼	72.3	28½	77.1	30¼ 	7.52	16½ 	9.18	20¼	10.93	24
1	71.7	28¼	76.1	30	81.2	32	8.43	18½ 	10.15	22½	11.99	26½
1½	77.5	30½	82.4	32½	88.1	34¾	9.59	21¼ 	11.47	25¼	13.44	29½
2†	82.5	32½	86.8	34¼	94.4	37¼ 	10.49	23¼ 	12.34	27¼	15.50	34¼
2½†	85.4	33½	90.4	35½	97.8	38½ 	11.27	24¾	13.52	29¾	16.61	36½
3	89.0	35	94.9	37¼	102.0	40¼ 	12.05	26½ 	14.62	32¼	17.77	39¼
3½	92.5	36½	99.1	39	106.1	41¾	12.84	28¼	15.68	34½ 	18.98	41¾
4	95.8	37¾	102.9	40½	109.9	43¼ 	13.64	30	16.69	36¾	20.27	44¾
4½	98.9	39	106.6	42	113.5	44¾	14.45	31¾	17.69	39	21.63	47¾
5	102.0	40¼	109.9	43¼	117.0	46	15.27	33¾	18.67	41¼	23.09	51
6	107.7	42½	116.1	45¾	123.5	48½ 	16.93	37¼ 	20.69	45½ 	26.34	58
7	113.0	44½	121.7	48	129.7	51	18.64	41	22.85	50¼	30.12	66½
8	118.1	46½	127.0	50	135.7	53½ 	20.40	45	25.30	55¾	34.51	76
9	122.9	48½	132.2	52	141.8	55¾	22.25	49	28.13	62	39.58	87¼
10	127.7	50¼	137.5	54¼	148.1	58¼ 	24.33	53¾	31.44	69¼	45.27	99¾
11	132.6	52¼	143.3	56½	154.9	61	26.80	59	35.30	77¾	51.47	113½
12	137.6	54¼	149.7	59	162.3	64	29.85	65¾	39.78	87¾	58.09	128
13	142.9	56¼	156.5	61½	169.8	66¾	33.64	74¼ 	44.95	99	65.02	143¼
14	148.8	58½	163.1	64¼	176.7	69½ 	38.22	84¼ 	50.77	112	72.13	159
15	155.2	61	169.0	66½	181.9	71½ 	43.11	95	56.71	125	79.12	174½
16	161.1	63½	173.5	68¼	185.4	73	47.74	105¼ 	62.10	137	85.62	188¾
17	164.9	65	176.2	69¼	187.3	73¾	51.50	113½ 	66.31	146¼	91.31	201¼
18	165.7	65¼	176.8	69½	187.6	73¾	53.97	119	68.88	151¾	95.76	211

Girls
Birth	45.4	17¾	49.9	19¾	52.9	20¾	2.36	5¼	3.23	7	3.81	8½
3 months	55.4	21¾	59.5	23½	63.4	25	4.18	9¼	5.4	12	6.74	14¾
6 months	61.8	24¼	65.9	26	70.2	27¾	5.79	12¾	7.21	16 	8.73	19¼
9 months	66.1	26	70.4	27¾	75.0	29½ 	7.0	15½ 	8.56	18¾ 	10.17	22½
1	69.8	27½	74.3	29¼	79.1	31¼	7.84	17¼	9.53	21 	11.24	24¾
1½	76.0	30	80.9	31¾	86.1	34	8.92	19¾ 	10.82	23¾ 	12.76	28¼
2†	81.6	32¼	86.8	34¼	93.6	36¾ 	9.95	22 	11.8	26 	14.15	31¼
2½†	84.6	33¼	90.0 	35½	96.6	38 	10.8	23¾	13.03	28¾	15.76	34¾
3	88.3	34¼	94.1	37	100.6	39½	11.61	25½ 	14.1	31 	17.22	38
3½	91.7	36	97.9	38½	104.5	41¼	12.37	27¼ 	15.07	33¼ 	18.59	41
4	95.0	37½	101.6	40	108.3	42 ¾	13.11	29	15.96	35¼	19.91	44
4½	98.1	38½	105.0	41¼	112.0	44	13.83	30½	16.81	37	21.24	46¾
5	101.1	39¾	108.4	42¾	115.6	45½	14.55	32	17.66	39 	22.62	49¾
6	106.6	42	114.6	45	122.7	48¼ 	16.05	35½ 	19.52	43 	25.75	56¾
7	111.8	44	120.6	47½	129.5	51	17.71	39	21.84	48¼ 	29.68	65½
8	116.9	46	126.4	49¾	136.2	53½ 	19.62	43¼	24.84	54¾	34.71	76½
9	122.1	48	132.2	52	142.9	56¼	21.82	48	28.46	62¾	40.64	89½
10	127.5	50¼	138.3	54½	149.5	58¾ 	24.36	53¾	32.55	71¾ 	47.17	104
11	132.5	52½	144.8	57	156.2	61½	27.24	60	36.95	81½	54.00	119 
12	139.8	55	151.5	59¾	162.7	64	30.52	67¼	41.53	91½	60.81	134
13	145.2	57¼	157.1	61¾	168.1	66¼	34.14	75¼	46.1	101¾	67.30	148¼
14	148.7	58½	160.4	63¼	171.3	67½ 	37.76	83¼ 	50.28	110¾	73.08	161
15	150.5	59¼	161.8	63¾	172.8	68 	40.99	90¼	53.68	118¼	77.78	171½
16	151.6	59¾	162.4	64	173.3	68¼	43.41	95¾ 	55.89	123¼	80.99	178½
17	152.7	60	163.1	64¼	173.5	68¼	44.74	98¾ 	56.69	125 	82.46	181¾
18	153.6	60½	163.7	64½	173.6	68¼	45.26	99¾	56.62	124¾	82.47	181¾

*Years, unless otherwise indicated

†Height data include some recumbent length measurements, which make values slightly higher than if all measurements had been of stature (standing height). From Wong DL: Whaley and Wong's essentials of pediatric nursing, St Louis, 1993, Mosby.
Modified from National Center for Health Statistics (NCHS), Health Resources Administration, Department of Health, Education and Welfare, Hyattsville, MD. Conversion of metric data to approximate inches and pounds by Ross Laboratories, 1977.