Blood Pressure Category Calculator — AHA/ACC Categories
Check which American Heart Association category your blood pressure falls into, average up to three readings as guidelines recommend, and see your pulse pressure and mean arterial pressure.
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AHA Blood Pressure Categories
Your category is set by whichever number — systolic or diastolic — falls in the higher band.
| Category | Systolic (top) | Diastolic (bottom) |
|---|
How this calculator works
- Average: if you enter more than one reading, the systolic and diastolic values are averaged separately, as guidelines recommend basing decisions on 2 or more readings.
- Category: the higher of the systolic and diastolic categories, using the American Heart Association chart shown above (aligned with the 2025 AHA/ACC high blood pressure guideline).
- Pulse pressure = systolic − diastolic. Mean arterial pressure ≈ diastolic + (systolic − diastolic) ÷ 3.
By Suhaib Hassan · Reviewed 28 September 2026 against the AHA blood pressure chart · How CalculatePilot verifies formulas →
A worked example
Readings of 128/82, 132/84 and 126/80 average to 129/82 mm Hg. The systolic of 129 is "elevated", but the diastolic of 82 is in the 80–89 range, so the overall category is stage 1 hypertension. Pulse pressure is 47 mm Hg and mean arterial pressure about 98 mm Hg.
When to act
If a reading is higher than 180/120 mm Hg, the AHA advises waiting a minute and measuring again. If it's still that high and you have no symptoms, it's severe hypertension — call your healthcare professional. If you have symptoms such as chest pain, shortness of breath, back pain, numbness, weakness, vision changes or difficulty speaking, it may be a hypertensive emergency — call 911 (or your local emergency number).
These categories are for adults. Children and teens use age-based ranges, and blood pressure in pregnancy needs individual guidance from your care team. This calculator categorizes readings for awareness only — it is not a diagnosis. Blood pressure varies through the day with stress, caffeine, activity and technique, so a clinician looks at the pattern of readings over time. For home readings, sit quietly for 5 minutes with your back supported, feet flat and arm at heart level, and avoid caffeine, exercise and smoking for 30 minutes beforehand.
Sources
- American Heart Association — Understanding Blood Pressure Readings (reviewed August 2025)
- Jones DW, Ferdinand KC, Taler SJ, et al. 2025 AHA/ACC/AANP/AAPA/ABC/ACCP/ACPM/AGS/AMA/ASPC/NMA/PCNA/SGIM Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults. Hypertension 2025.
- American Heart Association — Monitoring Your Blood Pressure at Home
Frequently asked questions
Which number matters more, systolic or diastolic?
Both matter. Your category is set by whichever number falls in the higher band. After about age 50, systolic pressure becomes a stronger predictor of heart disease and stroke risk for most people.
Is one high reading a diagnosis of high blood pressure?
No. Diagnosis is based on the average of two or more readings taken on two or more occasions. A single high reading is worth rechecking, and repeated high readings are worth discussing with a clinician.
What is a normal blood pressure?
Under the AHA categories, normal is a systolic below 120 and a diastolic below 80 mm Hg.
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