The normal range of blood pressure for a 47 year old is 90 to 139 mmHg systolic and 60 to 89 mmHg diastolic. as long as the blood pressure is within the normal range it is considered normal blood pressure. Blood pressure, usually referred to as arterial blood pressure in the body circulation, is a very important vital sign and is used in the diagnosis of a wide range of diseases as well as in the monitoring of critically ill patients.Normal values for blood pressure in adults over 18 years of age are 90 to 139 mmHg systolic and 60 to 89 mmHg diastolic. Hypertension is diagnosed in patients with systolic blood pressure ≥140 mmHg and/or diastolic blood pressure ≥90 mmHg on 3 measurements of office blood pressure not taken on the same day under non-pharmacologic control. In contrast, a systolic blood pressure <90 mmHg and/or diastolic blood pressure <60 mmHg is considered hypotension and needs to be analyzed on a case-by-case basis. Factors such as age, weight, and lifestyle habits can affect the normal value of blood pressure. Average blood pressure increases with age, with systolic pressure increasing more significantly than diastolic pressure. Therefore, it is important to maintain good living habits in daily life and avoid smoking, alcoholism, obesity and high-fat, oily foods to prevent high blood pressure. If your blood pressure is too high or too low, you should go to a regular hospital in time to get a clear diagnosis and control your blood pressure as soon as possible.