Blood Pressure Category Calculator (AHA 2017)
Enter your systolic and diastolic readings to see your blood pressure category.
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Blood Pressure Category Calculator (AHA 2017) by TheCalcTools
How the Blood Pressure Category Calculator (AHA 2017) works
The 2017 American Heart Association / American College of Cardiology guideline classifies blood pressure by the higher of the two categories that the systolic and diastolic readings fall in.
Diagnosis is based on the average of two or more readings on two or more occasions. Readings above 180/120 need prompt medical attention, especially with symptoms such as chest pain or shortness of breath.
The formula
Worked example
Using the default values shown in the calculator:
| Systolic (top number, mmHg) | 128 |
|---|---|
| Diastolic (bottom number, mmHg) | 82 |
- 128/82: systolic is Elevated but diastolic 82 is Stage 1, so the category is Stage 1 hypertension.
- Pulse pressure 46 mmHg; MAP 97 mmHg.
Result:
| Category | Stage 1 hypertension |
|---|---|
| Pulse pressure (mmHg) | 46 |
| Mean arterial pressure (mmHg) | 97 |
Frequently asked questions
Do other countries use different thresholds?
Yes. European and some other guidelines define hypertension from 140/90. Follow your clinician’s local guideline.
How should I measure at home?
Sit quietly for 5 minutes, back supported, arm at heart level, and take two readings a minute apart.
Sources and further reading
- American Heart Association: Understanding blood pressure readings
- Whelton PK et al. (2018) 2017 ACC/AHA guideline for high blood pressure in adults. Hypertension 71:e13
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This calculator gives general estimates for information and education. It is not medical advice and does not diagnose anything. Talk to a qualified health professional about your own situation. See our disclaimer.