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Blood Pressure Calculator

Categorize your blood pressure reading using official AHA categories.

Introduction

Blood Pressure Calculator — Categorize your blood pressure reading using official AHA categories. Enter Systolic (mmHg), Diastolic (mmHg) to get an instant, accurate result.

Formula

Category follows American Heart Association guidelines: Normal (<120/<80), Elevated (120-129/<80), Hypertension Stage 1 (130-139/80-89), Hypertension Stage 2 (≥140/≥90), and Hypertensive Crisis (>180/>120 — seek immediate medical care).

Step-by-step

  1. Enter the Systolic (mmHg).
  2. Enter the Diastolic (mmHg).
  3. Click Calculate to see your result instantly.

Real-world example

Example: With Systolic (mmHg) = 120, Diastolic (mmHg) = 80, the Blood Pressure Calculator gives Systolic: 120, Diastolic: 80, Category: Hypertension Stage 1.

Frequently Asked Questions

Which number matters more, systolic or diastolic?
Both matter — the higher of the two values determines your category under AHA guidelines.
What should I do if my reading is in the Hypertensive Crisis range?
Readings above 180/120 mm Hg warrant prompt medical attention, especially if accompanied by symptoms like chest pain or shortness of breath.
What inputs does the Blood Pressure Calculator need?
You'll need to provide: Systolic (mmHg), Diastolic (mmHg). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the Blood Pressure Calculator?
The Blood Pressure Calculator applies the formula exactly as calculated — Category follows American Heart Association guidelines: Normal (<120/<80), Elevated (120-129/<80), Hypertension Stage 1 (130-139/80-89), Hypertension Stage 2 (≥140/≥90), and Hypertensive Crisis (>180/>120 — seek immediate medical care). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is this a medical diagnosis?
No. The Blood Pressure Calculator provides an estimate based on standard formulas and general population data, not a medical diagnosis or personalized clinical advice. Individual results can vary — consult a doctor or other qualified healthcare provider for medical concerns.
Is the Blood Pressure Calculator free to use?
Yes, the Blood Pressure Calculator is completely free, requires no signup, and runs instantly in your browser.

About the Blood Pressure Calculator

The Blood Pressure Calculator uses a real, verifiable formula — Category follows American Heart Association guidelines: Normal (<120/<80), Elevated (120-129/<80), Hypertension Stage 1 (130-139/80-89), Hypertension Stage 2 (≥140/≥90), and Hypertensive Crisis (>180/>120 — seek immediate medical care). — so results are accurate every time, not an approximation.