Evaluate Your Blood Pressure Reading
Enter your resting blood pressure values below to view their general classification.
Understanding Blood Pressure Readings
Blood pressure measures the pressure exerted by circulating blood against the walls of the body's blood vessels. It is recorded using two numbers, measured in millimeters of mercury (mmHg):
- Systolic Pressure (Top Number): Indicates the pressure in your arteries when the heart muscle contracts and pumps blood out to the body.
- Diastolic Pressure (Bottom Number): Indicates the pressure in your arteries when the heart muscle relaxes and refills with blood between beats.
Managing blood pressure is essential because persistent high blood pressure (hypertension) places extra strain on your heart and arteries, which over time increases the risk of heart attacks, stroke, kidney disease, and vascular complications.
AHA Blood Pressure Categories
The standard categories for adults are defined as follows:
| Category | Systolic (Top) | Diastolic (Bottom) | |
|---|---|---|---|
| Normal | Less than 120 | and | Less than 80 |
| Elevated | 120 – 129 | and | Less than 80 |
| Stage 1 Hypertension | 130 – 139 | or | 80 – 89 |
| Stage 2 Hypertension | 140 or Higher | or | 90 or Higher |
| Hypertensive Crisis | Higher than 180 | and/or | Higher than 120 |
How to Measure Blood Pressure Accurately
To ensure you get an accurate reading when monitoring your blood pressure at home, follow these clinical guidelines:
- Rest Before Testing: Sit quietly and rest for at least 5 minutes before taking a measurement. Avoid physical exertion, smoking, caffeine, or eating for 30 minutes prior.
- Sit Properly: Sit in a chair with your back supported, feet flat on the floor (do not cross your legs), and support your arm on a table so the cuff is at heart level.
- Use the Correct Cuff Size: Ensure the cuff fits snugly but comfortably around your bare upper arm. A cuff that is too small or too large will give inaccurate readings.
- Take Multiple Readings: Take 2 or 3 readings, spaced 1 to 2 minutes apart, and average the results. Record your readings in a log to share with your healthcare provider.
What to Track & Monitor
When tracking your blood pressure over time, keep a log of the following parameters:
- Date and Time: Note the time of day the reading was taken. Blood pressure is typically lower in the morning and rises during the day.
- Systolic, Diastolic, and Pulse: Record all three numbers from your monitor.
- Accompanying Symptoms: Always note if a high reading is accompanied by physical symptoms like headaches, dizziness, chest pressure, shortness of breath, or nosebleeds.
- Recent Factors: Log potential influences like poor sleep, stress, salt intake, alcohol consumption, or missed medications.
When to See a Doctor
Consult a healthcare professional regarding your blood pressure readings in the following situations:
- You regularly record readings in the Elevated or Stage 1 range, so your doctor can help you evaluate lifestyle modifications.
- You consistently record Stage 2 readings (Systolic ≥ 140 or Diastolic ≥ 90 mmHg). Lifestyle changes and medications are often recommended at this stage to prevent arterial damage.
- Your blood pressure values fluctuate dramatically between very high and very low readings.
- You are experiencing symptoms like dizziness, lightheadedness, or fainting, which can sometimes indicate blood pressure that is too low (hypotension).
Frequently Asked Questions
Systolic blood pressure (the top number) measures the force of blood against artery walls when the heart beats. Diastolic blood pressure (the bottom number) measures the pressure in the arteries when the heart rests between beats.
A hypertensive crisis occurs when blood pressure rises suddenly and severely, with a systolic reading of 180 mmHg or higher, or a diastolic reading of 120 mmHg or higher. If accompanied by chest pain, shortness of breath, headache, or vision changes, it is a medical emergency.
No. Blood pressure fluctuates constantly due to stress, activity, hydration, and caffeine. A medical diagnosis of hypertension requires multiple elevated readings taken over a period of time under resting conditions, evaluated by a healthcare professional.
