What is the Normal Blood Pressure: What Your Numbers Really Mean
What is normal blood pressure? Learn what systolic and diastolic numbers mean, the healthy range and when a reading may be concerning.
Understanding what your normal blood pressure number means can help you make sense of one of the most commonly checked measures of health.
A blood pressure reading is made up of two numbers. The first one is the systolic pressure, which measures the force of blood against artery walls when the heart beats, while the second is the diastolic pressure, which measures the pressure between heartbeats.
For the majority of adults, a reading below 120/80 mmHg is considered normal. However, blood pressure can vary depending on factors such as activity, stress, and when the measurement is taken.
| Blood pressure category | Systolic | Diastolic |
|---|---|---|
| Normal | Below 120 | Below 80 |
| Elevated | 120–129 | Below 80 |
| Stage 1 hypertension | 130–139 | 80–89 |
| Stage 2 hypertension | 140 or higher | 90 or higher |
| Severe hypertension | Above 180 | Above 120 |
The two numbers therefore tell different parts of the story. A higher systolic reading interprets there is greater pressure in the arteries when the heart pumps, while a higher diastolic reading indicates increased pressure while the heart is resting between beats.
It is important not to panic over one unusual reading. Blood pressure can also temporarily rise after exercise, during periods of stress or after consuming caffeine, among other factors.
For people checking their blood pressure at home, getting measurements correct is just as important as the number itself. Sitting quietly beforehand, keeping the back supported, and positioning the arm appropriately help produce a more reliable reading.
Repeatedly high readings should never be ignored. High blood pressure can increase the risk of conditions including heart disease and stroke, and many people may have it without experiencing obvious symptoms.
A reading that reads above 180/120 mmHg requires particular attention, especially when accompanied by symptoms such as chest pain, breathing difficulties, weakness, vision changes, or difficulty speaking.
Ultimately, knowing what your numbers mean is useful, but a healthcare professional should interpret persistent abnormal readings and determine whether further evaluation is necessary.
