arm circumference percentiles P3–P97, World Health Organization

World Health Organization’s published arm circumference figures, P3 to P97 month by month, up to 5 years. Boys and girls separately.

boy

Age in years runs along the bottom and arm circumference（cm） up the side. The five lines are, from the bottom, the 3rd, 15th, 50th, 85th and 97th percentiles, ranging from 11.7 to 19.5. The full figures are in the table above.

World Health Organization percentile curves for arm circumference, boy.

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yearsmonths

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World Health Organization · arm circumference, boy（cm）
Age	P3	P15	P50	P85	P97
3 months	11.7	12.5	13.5	14.6	15.5
4 months	11.9	12.8	13.8	14.9	15.9
5 months	12.2	13.0	14.1	15.2	16.2
6 months	12.3	13.1	14.2	15.4	16.4
7 months	12.4	13.3	14.4	15.5	16.5
8 months	12.5	13.3	14.5	15.6	16.7
9 months	12.5	13.4	14.5	15.7	16.7
10 months	12.6	13.5	14.6	15.8	16.8
11 months	12.6	13.5	14.6	15.8	16.9
12 months	12.7	13.5	14.6	15.9	16.9
13 months	12.7	13.5	14.7	15.9	16.9
14 months	12.7	13.6	14.7	15.9	17.0
15 months	12.7	13.6	14.7	16.0	17.0
16 months	12.8	13.6	14.8	16.0	17.1
17 months	12.8	13.7	14.8	16.0	17.1
18 months	12.8	13.7	14.8	16.1	17.2
19 months	12.9	13.7	14.9	16.1	17.2
20 months	12.9	13.8	14.9	16.2	17.3
21 months	13.0	13.8	15.0	16.2	17.3
22 months	13.0	13.9	15.0	16.3	17.4
23 months	13.1	13.9	15.1	16.4	17.5
2 years	13.1	14.0	15.2	16.4	17.5
2y 3m	13.3	14.1	15.3	16.6	17.8
2y 6m	13.4	14.3	15.5	16.8	18.0
2y 9m	13.5	14.4	15.6	17.0	18.2
3 years	13.6	14.5	15.7	17.1	18.3
3y 3m	13.7	14.6	15.8	17.2	18.5
3y 6m	13.7	14.7	15.9	17.4	18.6
3y 9m	13.8	14.8	16.0	17.5	18.8
4 years	13.9	14.8	16.1	17.6	18.9
4y 3m	13.9	14.9	16.2	17.7	19.1
4y 6m	14.0	15.0	16.3	17.8	19.2
4y 9m	14.1	15.1	16.4	18.0	19.4
5 years	14.1	15.1	16.5	18.1	19.5

girl

Age in years runs along the bottom and arm circumference（cm） up the side. The five lines are, from the bottom, the 3rd, 15th, 50th, 85th and 97th percentiles, ranging from 11.2 to 20.1. The full figures are in the table above.

World Health Organization percentile curves for arm circumference, girl.

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World Health Organization · arm circumference, girl（cm）
Age	P3	P15	P50	P85	P97
3 months	11.2	12.0	13.0	14.2	15.3
4 months	11.5	12.3	13.4	14.6	15.7
5 months	11.7	12.5	13.6	14.8	15.9
6 months	11.8	12.6	13.8	15.0	16.2
7 months	11.9	12.8	13.9	15.2	16.3
8 months	12.0	12.8	14.0	15.3	16.4
9 months	12.0	12.9	14.1	15.3	16.5
10 months	12.1	13.0	14.1	15.4	16.6
11 months	12.1	13.0	14.2	15.4	16.6
12 months	12.2	13.0	14.2	15.5	16.6
13 months	12.2	13.1	14.2	15.5	16.7
14 months	12.3	13.1	14.3	15.6	16.7
15 months	12.3	13.2	14.3	15.6	16.8
16 months	12.4	13.2	14.4	15.7	16.8
17 months	12.4	13.3	14.4	15.7	16.9
18 months	12.4	13.3	14.5	15.8	16.9
19 months	12.5	13.4	14.5	15.8	17.0
20 months	12.6	13.4	14.6	15.9	17.0
21 months	12.6	13.5	14.7	16.0	17.1
22 months	12.7	13.6	14.7	16.0	17.2
23 months	12.7	13.6	14.8	16.1	17.3
2 years	12.8	13.7	14.9	16.2	17.4
2y 3m	13.0	13.9	15.1	16.5	17.7
2y 6m	13.2	14.1	15.3	16.7	17.9
2y 9m	13.3	14.2	15.5	16.9	18.1
3 years	13.4	14.4	15.6	17.1	18.4
3y 3m	13.5	14.5	15.8	17.3	18.6
3y 6m	13.6	14.6	16.0	17.5	18.8
3y 9m	13.7	14.7	16.1	17.6	19.0
4 years	13.8	14.8	16.2	17.8	19.2
4y 3m	13.9	15.0	16.4	18.0	19.5
4y 6m	14.0	15.1	16.6	18.2	19.7
4y 9m	14.1	15.2	16.7	18.4	19.9
5 years	14.2	15.3	16.9	18.6	20.1

About this table

From 5 years the reference becomes WHO Growth Reference 2007, where the overweight cut-off tightens from above +2 SD to above +1 SD. A label can move up a step on the fifth birthday. That is the join between two tables.