Blood Pressure Category
Enter systolic and diastolic values to determine the blood pressure category according to the 2017 ACC/AHA guidelines. Optional heart rate provides additional context.
How to Use This Calculator
Measure accurately
Ensure the patient is seated and rested, the correct cuff size is used, and multiple readings are averaged for diagnostic decisions.
Enter systolic and diastolic values
Optional heart rate information can provide additional context, but is not required for classification.
Follow guideline-based recommendations
Use the resulting category to guide lifestyle counseling, monitoring frequency, and the need for antihypertensive medications based on cardiovascular risk.
Formula
Mean Arterial Pressure = (Systolic + 2 × Diastolic) ÷ 3
Pulse Pressure = Systolic − Diastolic
Blood pressure categories follow ACC/AHA 2017 adult guidelines.
Full Description
Blood pressure classification helps stratify cardiovascular risk. Elevated readings prioritize lifestyle change, while sustained hypertension often requires pharmacologic therapy. Hypertensive crises demand urgent evaluation for end-organ damage. Accurate measurements—including home or ambulatory monitoring—enhance diagnostic precision.
Address modifiable risk factors such as sodium intake, obesity, physical inactivity, and alcohol consumption. Evaluate for secondary causes when appropriate (renal disease, endocrine disorders, medication-induced hypertension).
Frequently Asked Questions
How many readings are required for diagnosis?
Typically, average ≥2 readings on ≥2 separate occasions unless initial values show hypertensive crisis.
Is home blood pressure monitoring useful?
Yes. Home or ambulatory monitoring improves accuracy, detects white-coat or masked hypertension, and guides therapy.
What lifestyle changes are most effective?
DASH diet, weight reduction, sodium restriction, regular aerobic activity, and limiting alcohol significantly reduce blood pressure.
When is emergency care necessary?
Blood pressure ≥180/120 mmHg with symptoms such as chest pain, shortness of breath, or neurologic deficits requires emergency evaluation for hypertensive emergency.