❤️ Blood Pressure Range: Calculator

Check your blood pressure category instantly using the American Heart Association guidelines.

mmHg
mmHg
YOUR READING
118 / 76 mmHg
Normal

Understanding Blood Pressure Categories

Blood pressure is measured as two numbers: systolic (pressure when your heart beats) over diastolic (pressure when your heart rests between beats). This calculator applies the American Heart Association (AHA) blood pressure categories to classify your reading.

CategorySystolic (mmHg)Diastolic (mmHg)
NormalLess than 120andLess than 80
Elevated120-129andLess than 80
High BP – Stage 1130-139or80-89
High BP – Stage 2140 or higheror90 or higher
Hypertensive CrisisHigher than 180and/orHigher than 120

Tips for Accurate Home Readings

⚠️ Important: This tool provides general educational classification only, not a diagnosis. A single elevated reading doesn't necessarily mean you have hypertension — consult a healthcare provider for proper evaluation, especially for consistently high readings.

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❓ Frequently Asked Questions

What is considered normal blood pressure?
According to the American Heart Association, normal blood pressure is a systolic reading below 120 mmHg and a diastolic reading below 80 mmHg (commonly written as below 120/80).
What should I do if my reading falls in the crisis range?
A reading above 180/120 mmHg is considered a hypertensive crisis. If you also have symptoms like chest pain, shortness of breath, or vision changes, seek emergency medical care immediately. Even without symptoms, contact a doctor promptly.
Can one high reading mean I have hypertension?
Not necessarily. Blood pressure naturally fluctuates throughout the day due to stress, activity, caffeine, and other factors. A diagnosis of high blood pressure typically requires multiple elevated readings measured on separate occasions.
Why are there two different rules (and/or) for each category?
Blood pressure categories use the higher of your two numbers to classify your reading — if either your systolic OR diastolic number falls into a higher category, your overall classification uses that higher category.
Can lifestyle changes lower blood pressure?
Yes — regular exercise, reducing sodium intake, maintaining a healthy weight, limiting alcohol, managing stress, and not smoking can all meaningfully help lower blood pressure for many people, often alongside any treatment a doctor recommends.

🏆 About This Tool — Accuracy & Trust

🔒 Data Privacy: All calculations run entirely within your browser using JavaScript. Nothing you enter here is ever transmitted to our servers, stored, sold, or shared.

📐 Accuracy Note: This tool uses standard, widely published formulas and guidelines. Results are estimates for informational purposes; for financial, medical, or engineering decisions, consult a licensed professional.

📅 Last Updated: September 2026.