Blood Pressure Calculator
Classify your blood pressure using AHA/ACC 2017 guidelines with risk assessment and health recommendations
Enter up to 3 readings for a more accurate average. Take readings 1 minute apart while seated and relaxed.
Blood pressure norms can vary slightly with age
Your resting pulse in beats per minute. Measure while seated and relaxed for at least 5 minutes.
This tool is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider for blood pressure diagnosis and treatment. If your reading is above 180/120, seek emergency medical care immediately.
Check Your Blood Pressure
Enter your systolic and diastolic blood pressure readings to see your classification, risk level, and health recommendations.
How to Use the Blood Pressure Calculator
Enter Your Blood Pressure Reading
Input your systolic (top number) and diastolic (bottom number) blood pressure values in mmHg. For a more accurate result, add up to 3 readings taken 1 minute apart. The calculator will average multiple readings automatically.
Add Optional Information
Optionally enter your age, gender, and resting heart rate for more contextualized results. Your resting heart rate should be measured while seated and relaxed for at least 5 minutes.
Review Your Classification
Click Check Blood Pressure to see your AHA/ACC classification (Normal, Elevated, Stage 1, Stage 2, or Crisis). The visual gauge shows where your reading falls on the blood pressure scale, and your MAP and Pulse Pressure are calculated automatically.
Follow Health Recommendations
Review the personalized health recommendations and lifestyle modification suggestions based on your category. The reference table shows all AHA/ACC categories for comparison. Share results with your healthcare provider for professional guidance.
Frequently Asked Questions
What is a normal blood pressure reading?
According to the 2017 AHA/ACC guidelines, a normal blood pressure reading is less than 120 mmHg systolic AND less than 80 mmHg diastolic (written as <120/80 mmHg). Blood pressure between 120-129 systolic with diastolic less than 80 is classified as 'Elevated' and indicates increased risk of developing hypertension. Readings of 130/80 mmHg or higher are now classified as high blood pressure. It is important to note that a single high reading does not necessarily mean you have hypertension — blood pressure fluctuates throughout the day based on activity, stress, caffeine, and many other factors. Your doctor will typically want to see consistently elevated readings over multiple visits before making a diagnosis.
What is Mean Arterial Pressure (MAP) and why does it matter?
Mean Arterial Pressure (MAP) is the average pressure in your arteries during one complete cardiac cycle. It is calculated using the formula: MAP = Diastolic + 1/3 x (Systolic - Diastolic). The diastolic phase gets more weight because the heart spends about two-thirds of each cycle in relaxation. A normal MAP is between 70 and 100 mmHg. MAP is clinically important because it represents the actual perfusion pressure that drives blood to your organs. A MAP below 60 mmHg may mean organs are not receiving adequate blood supply, while a MAP consistently above 100 mmHg indicates the heart is working harder than it should, increasing the risk of organ damage.
How should I measure my blood pressure at home for accurate results?
For accurate home readings, follow these steps: Sit quietly for 5 minutes before measuring. Sit with your back supported and feet flat on the floor — do not cross your legs. Place your arm on a flat surface with the upper arm at heart level. Use a validated automatic blood pressure monitor with a properly sized cuff. Take two or three readings one minute apart and record all results. Measure at the same time each day, preferably morning and evening. Avoid caffeine, exercise, and smoking for at least 30 minutes before measuring. Do not measure over clothing. Our calculator supports entering up to 3 readings for automatic averaging.
What is pulse pressure and what does it indicate?
Pulse pressure is the difference between your systolic and diastolic blood pressure. For example, if your reading is 130/80, your pulse pressure is 50 mmHg. A normal pulse pressure is typically between 40 and 60 mmHg. A pulse pressure above 60 mmHg may indicate arterial stiffness, which is common with aging and is associated with increased cardiovascular risk. A very narrow pulse pressure (below 25 mmHg) may suggest poor heart function or significant blood loss. Wide pulse pressure is particularly common in older adults with isolated systolic hypertension and is an independent risk factor for heart disease.
When should I seek emergency medical care for high blood pressure?
Seek emergency care immediately if your blood pressure reading is above 180/120 mmHg AND you are experiencing symptoms such as: severe headache, chest pain, shortness of breath, back pain, numbness or weakness, vision changes, difficulty speaking, or nausea. This is called a hypertensive emergency and can cause organ damage to the brain, heart, kidneys, or blood vessels. If your reading is above 180/120 but you have NO symptoms, wait 5 minutes, relax, and retest. If it remains elevated, contact your doctor the same day or visit an urgent care facility. Do not ignore consistently high readings even without symptoms.