Blood Pressure Analyzer
Enter your systolic and diastolic blood pressure readings to instantly determine your category based on the American Heart Association (AHA) 2017 guidelines. Free, private, and runs entirely in your browser.
Key Capabilities
AHA 2017 hypertension guideline classification
Classifies readings according to the American Heart Association 2017 guidelines — the most widely adopted clinical reference for blood pressure categories used by doctors worldwide.
Hypertensive crisis detection with emergency prompt
If the entered reading exceeds 180 systolic or 120 diastolic, the tool surfaces a prominent emergency notice advising immediate medical attention — the clinical threshold for hypertensive crisis.
Fully private — no reading is ever transmitted
Blood pressure values are sensitive cardiovascular data. All classification logic executes locally in your browser. No reading is ever sent to any server or linked to your session.
How to Use
Enter systolic and diastolic values
Type the two numbers from your blood pressure reading — systolic (top number) first, then diastolic (bottom number). Both are in mmHg.
Read your AHA category instantly
The category — Normal, Elevated, Stage 1 Hypertension, Stage 2, or Hypertensive Crisis — appears immediately with a colour indicator.
Follow up with your doctor if elevated
If your reading falls in Stage 1 or above, note the category and share it with your GP. Consistent elevation across multiple measurements is what clinicians assess, not a single reading.
Common Use Cases
- Home monitoring patientsA patient managing hypertension who takes daily home readings checks each result against AHA categories instantly, tracking whether medication keeps them in the normal range between appointments.
- Family caregivers monitoring elderly relativesAn adult child caring for an elderly parent with cardiovascular risk checks a reading category immediately and knows when to call a doctor without memorizing clinical thresholds.
- Pharmacists during community screening eventsA community pharmacist running a free screening clinic uses the tool on a tablet to instantly communicate a customer's AHA category after taking their reading.
Frequently Asked Questions
What do the blood pressure numbers mean?
The top number (systolic) is the pressure in your arteries when your heart beats. The bottom number (diastolic) is the pressure when your heart rests between beats. Both are measured in millimetres of mercury (mmHg).
What are the AHA blood pressure categories?
Normal: below 120/80 mmHg. Elevated: 120–129 systolic with diastolic below 80. Stage 1 Hypertension: 130–139 systolic or 80–89 diastolic. Stage 2 Hypertension: 140+ systolic or 90+ diastolic. Hypertensive Crisis: over 180 systolic or over 120 diastolic — seek emergency care immediately.
When should I seek medical attention?
If your reading is consistently above 130/80 mmHg, consult a doctor. A reading above 180/120 mmHg is a hypertensive crisis — seek emergency medical care immediately even if you have no other symptoms.
Is my BP data private?
Yes. All calculations run locally in your browser. Your blood pressure values are never uploaded to any server.
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