Blood Pressure Calculator
Classify your systolic and diastolic blood pressure readings according to the latest American Heart Association (AHA) and American College of Cardiology (ACC) clinical standards.
AHA/ACC Blood Pressure Categories
- Normal: Systolic < 120 and Diastolic < 80 mmHg.
- Elevated: Systolic 120–129 and Diastolic < 80 mmHg.
- Hypertension Stage 1: Systolic 130–139 or Diastolic 80–89 mmHg.
- Hypertension Stage 2: Systolic ≥ 140 or Diastolic ≥ 90 mmHg.
- Hypertensive Crisis (> 180 and/or > 120 mmHg): Requires immediate medical attention!
What Is a Blood Pressure Calculator?
A Blood Pressure Calculator is an evidence-based cardiovascular assessment tool designed to help users evaluate hemodynamic parameters, pulse dynamics, and cardiovascular risk indicators according to American Heart Association (AHA) and American College of Cardiology (ACC) standards. By analyzing user inputs such as systolic and diastolic blood pressure, age, or heart rate, it categorizes cardiovascular benchmarks for educational discussion with a qualified physician.
How to Use This Calculator
- Enter your systolic pressure (top number in mmHg).
- Enter your diastolic pressure (bottom number in mmHg).
- Click 'Classify Blood Pressure' to view your clinical category, pulse pressure, and health interpretation.
How This Calculator Works
The calculator maps systolic (SBP) and diastolic (DBP) pressures against the 2017 AHA/ACC guidelines: Normal (<120 and <80 mmHg), Elevated (120-129 and <80 mmHg), Stage 1 Hypertension (130-139 or 80-89 mmHg), Stage 2 Hypertension (≥140 or ≥90 mmHg), and Hypertensive Crisis (>180 and/or >120 mmHg).
Understanding Your Results
If systolic and diastolic readings fall into different categories, the higher category determines your classification. Consistent elevated readings over multiple days should prompt an evaluation with your physician.
Frequently Asked Questions
What is white-coat hypertension?
White-coat hypertension occurs when blood pressure is elevated in a medical clinic due to situational anxiety or stress, but normal during home monitoring. Home blood pressure logs help distinguish this phenomenon.
How should I prepare before measuring my blood pressure?
Sit quietly with back supported and feet flat on the floor for five minutes before measuring. Avoid caffeine, exercise, and smoking for at least 30 minutes beforehand, and ensure the cuff is positioned at heart level.
What constitutes a hypertensive crisis?
Readings exceeding 180 mmHg systolic or 120 mmHg diastolic constitute a crisis. If accompanied by chest pain, shortness of breath, back pain, numbness, or visual changes, emergency medical services should be called immediately.
Related Calculators
Important Limitations & Medical Disclaimer
Notice: Blood pressure classifications are educational and reference clinical screening guidelines. A diagnosis of hypertension requires multiple confirmed readings across different visits by a licensed physician.