Blood pressure is the amount of pressure generated when blood pumped out from our heart. The range of normal blood pressure varies among individual and it is very wide. In fact high blood pressure is a status rather than a disease. Healthy adults may also have high blood pressure occasionally, especially during emotional or weather change. Therefore, it is necessary to have several measures on blood pressure at different time in order to obtain an accurate mesaure; the unit is millimeters of mercury (mmHg).

According to the World Health Organization, the normal range if blood pressure is as follow:

Below 139 / 89	Normal Blood Pressure
140 / 90 to 160 / 95	Marginal Blood Pressure
Above 161 / 96	High Blood Pressure

Average Blood Pressure of Children (mmHg)
Age	Systolic Pressure	Diastolic Pressure
New Born Baby	80+-16	46+-16
6 Months	89+-29	60+-10
1 Year Old	96+-30	66+-25
2 Years Old	99+-25	64+-25
3 Years Old	100+-25	67+-23
4 Years Old	99+-20	65+-20
5 Years Old	94+-14	55+-9
6 Years Old	100+-15	56+-8
7 Years Old	102+-15	57+-9
8 Years Old	105+-16	57+-9
9 Years Old	107+-16	57+-9
10 Years Old	111+-17	58+-10

Average Normal Blood Pressure (mmHg)
Age (Years Old)	Male		Female
	Systolic Pressure	Diastolic Pressure	Systolic Pressure	Diastolic Pressure
16 - 20	104	64	98	61
21 - 25	106	66	100	63
26 - 30	108	68	102	64
31 - 35	110	70	106	66
36 - 40	112	72	108	68
41 - 45	114	73	110	69
45 - 50	116	74	112	70
51 - 55	118	75	114	71
56 - 60	120	76	116	72