Normal Heart Rate in Children by Weight

Heart Rate · Normal Values

Notes

Usually hypoxemia leads to bradycardia!
Tachycardia is usually well tolerated

Heart Rate: value for each weight
Weight	Age (estimate)	Value
2 kg	preterm	100 to 200 per minute
3 kg	newborn	100 to 160 per minute
4 kg	1 mo	100 to 160 per minute
5 kg	2 mo	100 to 160 per minute
6 kg	4 mo	100 to 160 per minute
7 kg	6 mo	100 to 160 per minute
8 kg	8 mo	100 to 150 per minute
9 kg	10 mo	100 to 150 per minute
10 kg	1 y	90 to 140 per minute
11 kg	1 y 6 mo	90 to 140 per minute
12 kg	2 y	90 to 130 per minute
13 kg	2 y 4 mo	90 to 130 per minute
14 kg	2 y 8 mo	90 to 130 per minute
15 kg	3 y	80 to 120 per minute
16 kg	3 y 6 mo	80 to 120 per minute
17 kg	4 y	80 to 120 per minute
18 kg	4 y 6 mo	80 to 120 per minute
19 kg	5 y	70 to 110 per minute
20 kg	5 y 6 mo	70 to 110 per minute
21 kg	6 y	70 to 110 per minute
22 kg	6 y 4 mo	70 to 110 per minute
23 kg	6 y 8 mo	70 to 110 per minute
24 kg	7 y	70 to 110 per minute
25 kg	7 y 4 mo	70 to 110 per minute
26 kg	7 y 8 mo	70 to 110 per minute
27 kg	8 y	70 to 110 per minute
28 kg	8 y 4 mo	70 to 110 per minute
29 kg	8 y 8 mo	70 to 110 per minute
30 kg	9 y	60 to 100 per minute
31 kg	9 y 4 mo	60 to 100 per minute
32 kg	9 y 8 mo	60 to 100 per minute
33 kg	10 y	60 to 100 per minute
34 kg	10 y 3 mo	60 to 100 per minute
35 kg	10 y 6 mo	60 to 100 per minute
36 kg	10 y 9 mo	60 to 100 per minute
37 kg	11 y	50 to 100 per minute
38 kg	11 y 4 mo	50 to 100 per minute
39 kg	11 y 8 mo	50 to 100 per minute
40 kg	12 y	50 to 100 per minute

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Values imported unchanged on 2026-11-04. Independent verification against official sources is in progress (see Methodology).

Last updated: 2026-11-05