Blood Pressure Interpreter

How to Use the Blood Pressure Interpreter

Using this tool is simple — just enter the two numbers from your blood pressure reading:

• Systolic (top number): The pressure in your arteries when your heart beats and pumps blood. Enter this in the first field.
• Diastolic (bottom number): The pressure in your arteries when your heart rests between beats. Enter this in the second field.

Click Interpret My BP to instantly see your classification, derived metrics, and personalized recommendations. You can also click any of the quick examples to see how different readings are categorized.

Understanding Blood Pressure Categories

The American Heart Association (AHA) and American College of Cardiology (ACC) updated blood pressure guidelines in 2017. These are the current clinical standards used by healthcare providers:

• Normal: Systolic below 120 AND diastolic below 80 mmHg. No treatment needed — maintain healthy habits.
• Elevated: Systolic 120–129 AND diastolic below 80. Lifestyle changes are recommended to prevent progression to hypertension.
• Hypertension Stage 1: Systolic 130–139 OR diastolic 80–89. Your doctor may recommend lifestyle changes and possibly medication if you have cardiovascular risk factors.
• Hypertension Stage 2: Systolic 140+ OR diastolic 90+. Both lifestyle modifications and medication are typically recommended.
• Hypertensive Crisis: Systolic above 180 AND/OR diastolic above 120. Requires immediate medical attention.

The classification is determined by whichever number (systolic or diastolic) places you in the higher category.

What Are Pulse Pressure and MAP?

Beyond the basic reading, two derived metrics provide deeper clinical insight:

• Pulse Pressure = Systolic − Diastolic. A normal range is 25–40 mmHg. A wide pulse pressure (above 60) suggests arterial stiffness and increased cardiovascular risk. A narrow pulse pressure (below 25) may indicate reduced cardiac output.
• Mean Arterial Pressure (MAP) = Diastolic + ⅓ × (Systolic − Diastolic). This represents the average pressure driving blood through your organs. Normal MAP is 70–100 mmHg. MAP below 60 may mean inadequate organ perfusion.

Tips for Accurate Blood Pressure Measurement

• Sit quietly for 5 minutes before taking a reading
• Keep your arm supported at heart level
• Use a properly sized cuff (most errors come from incorrect cuff size)
• Avoid caffeine, exercise, and smoking for at least 30 minutes before
• Do not talk during the measurement
• Take 2–3 readings one minute apart and record the average
• Measure at the same time each day for the most consistent results

Frequently Asked Questions