Understand what your blood pressure reading means
Understanding blood pressure readings can be confusing. Many people receive a blood pressure result such as 130/85 mmHg or 150/95 mmHg and are unsure whether it is normal or whether medical review is needed.
This Blood Pressure Reader helps interpret blood pressure readings, calculate average blood pressure from multiple measurements and explain the result in simple language.
This tool provides educational information only and does not diagnose hypertension.
Enter one or more blood pressure readings. For each reading, enter the upper number (systolic) and the lower number (diastolic) — for example, 120 for systolic and 80 for diastolic. If you have taken more than one measurement, you can enter up to three readings and the tool will calculate the average automatically.
Answer the brief questions about your symptoms, where the reading was taken, and your blood pressure history. The tool will then interpret your reading and explain what it may mean.
Blood pressure is measured in millimetres of mercury (mmHg) and recorded as two numbers — systolic (upper) over diastolic (lower). A reading of 120/80 mmHg is generally considered the upper boundary of the normal range. The table below shows the standard blood pressure categories used in this tool.
| Category | Systolic (mmHg) | Diastolic (mmHg) | |
|---|---|---|---|
| Normal | Less than 120 | AND | Less than 80 |
| Elevated | 120–129 | AND | Less than 80 |
| Stage 1 Hypertension | 130–139 | OR | 80–89 |
| Stage 2 Hypertension | 140 or higher | OR | 90 or higher |
| Severely Elevated | 180 or higher | OR | 120 or higher |
The systolic number (upper number) is the pressure in your arteries when the heart beats and pumps blood. The diastolic number (lower number) is the pressure in your arteries between heartbeats, when the heart is at rest. Both numbers are important — the interpretation is based on the overall reading rather than one value alone.
Blood pressure is generally considered elevated when the systolic reading is 120 mmHg or above, or the diastolic reading is 80 mmHg or above. Stage 1 hypertension begins at 130/80 mmHg. Stage 2 hypertension begins at 140/90 mmHg. A reading of 180/120 mmHg or higher is considered severely elevated.
A single elevated reading does not confirm long-term hypertension. Blood pressure varies throughout the day and can be temporarily raised by physical activity, stress, caffeine, or being in a clinical setting. Repeated measurements over time are usually needed before a diagnosis is made.
No. A single elevated blood pressure reading does not diagnose hypertension. A diagnosis is usually based on repeated measurements taken on different occasions, combined with a clinical assessment. If your reading is consistently elevated, consult your doctor for a proper evaluation.
Home blood pressure monitoring can be a useful way to track readings over time. For more reliable measurements:
If your home readings are consistently elevated, consult your doctor rather than relying on self-monitoring alone.
Common questions about blood pressure readings, hypertension and assessment — answered by Sineth Hospitals.
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