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The bottom number, called the diastolic pressure, is the measurement as the heart relaxes between beats. Normal blood pressure is a systolic pressure of less than 120 millimeters of mercury (mm Hg) and a diastolic pressure of less than 80 mm Hg, or 120/80 mm Hg, according to the American Heart Association (AHA). Having a blood pressure greater than 140/90 mm Hg is considered high blood pressure or hypertension. A blood pressure level between normal and hypertension, is called prehypertension, meaning it is higher than normal, but not high enough to be considered hypertension.
What is the normal blood pressure range in adults? Below is a chart of the various blood pressure ranges â afterwards, we go into the details of what it means to you. If you are concerned you might have high blood pressure, see The Signs of High Blood Pressure. First entry is systolic pressure/second diastolic. Optimal blood pressure: 120/80. Normal: 120-129/80-84.