Blood Pressure Calculator – CalHub

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Blood Pressure Calculator

Check your blood pressure category by entering your systolic and diastolic readings.


Your BP Category

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What Is Blood Pressure?

Blood pressure (BP) is the measurement of how strongly blood pushes against the walls of your arteries as your heart pumps. It is recorded using two numbers: systolic pressure (upper value) and diastolic pressure (lower value), measured in millimeters of mercury (mmHg). Maintaining a healthy blood pressure level is essential for preventing heart disease, stroke, kidney problems, and other cardiovascular conditions.

Regular blood pressure monitoring helps identify high blood pressure (hypertension) or low blood pressure (hypotension) early, allowing timely lifestyle changes or medical consultation.

How to Use CalHub Blood Pressure Calculator

  1. Enter your systolic blood pressure (top number) in mmHg.
  2. Enter your diastolic blood pressure (bottom number) in mmHg.
  3. Click the “Calculate” button.
  4. Instantly view your blood pressure category such as Normal, Elevated, or High BP.

This online blood pressure calculator provides fast results and helps you understand whether your BP readings fall within a healthy range according to standard medical guidelines.

Blood Pressure Categories Explained

  • Normal: Less than 120/80 mmHg
  • Elevated: Systolic 120–129 and diastolic less than 80
  • High Blood Pressure (Stage 1): Systolic 130–139 or diastolic 80–89
  • High Blood Pressure (Stage 2): Systolic 140+ or diastolic 90+
  • Low Blood Pressure: Below 90/60 mmHg

Frequently Asked Questions (FAQs)

Normal blood pressure is generally considered to be around 120/80 mmHg. Readings consistently within this range indicate good heart health.

High blood pressure, also known as hypertension, occurs when systolic pressure is 130 mmHg or higher or diastolic pressure is 80 mmHg or higher over time.

No. This calculator is designed for educational and informational purposes only. Always consult a qualified healthcare professional for medical diagnosis or treatment.

Adults should check their blood pressure regularly, especially if they have risk factors such as obesity, diabetes, stress, smoking, or a family history of heart disease.

No. CalHub values your privacy. All blood pressure calculations are performed locally in your browser, and no personal data is saved or shared.