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Blood Pressure Category Calculator
See what your blood pressure reading means.
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How to Use This Calculator
- Systolic — the top number, the pressure when your heart beats.
- Diastolic — the bottom number, the pressure between beats.
Frequently Asked Questions
What is a normal blood pressure?
Less than 120/80 mmHg is considered normal under AHA/ACC guidelines.
What is elevated blood pressure?
120–129 systolic with diastolic below 80. It is not yet hypertension but raises your risk, so it is worth monitoring.
When should I be concerned?
Stage 1 is 130–139 or 80–89; stage 2 is 140+ or 90+. A reading of 180/120 or higher is a hypertensive crisis — seek medical care immediately.
Can one reading be trusted?
No — blood pressure varies. Confirm with several readings taken at different times, ideally with a validated home monitor.
Practical Example
A reading of 128/82:
- Systolic 128 is elevated.
- Diastolic 82 is stage 1 hypertension.
- Since the diastolic stage is worse, the overall category is stage 1 hypertension.
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