Classify your blood pressure reading using AHA guidelines. See color-coded risk levels from Normal to Hypertensive Crisis with lifestyle recommendations.
This calculator classifies a blood pressure reading into the standard adult categories used in current AHA/ACC guidance: Normal, Elevated, Stage 1 Hypertension, Stage 2 Hypertension, or Hypertensive Crisis / Severe Hypertension. It applies the rule that the higher category wins when systolic and diastolic values fall into different bands.
The result is meant to turn a raw reading into a category label you can track over time. It is not a diagnosis by itself. Hypertension is usually confirmed from repeated measurements, and urgent symptoms matter more than the category label alone when readings are very high.
That is why the calculator is best used as a structured reading aid: it helps with home-monitoring logs, counseling discussions, and quick reference, while still leaving diagnosis and treatment decisions to the full clinical picture.
This page is useful when you want the category logic and the reading in one place without memorizing the cutoffs. It helps with home tracking and follow-up planning, but it should be paired with repeat measurements and clinical advice rather than treated as a stand-alone diagnosis.
AHA 2017 Blood Pressure Categories: • Normal: Systolic < 120 AND Diastolic < 80 • Elevated: Systolic 120-129 AND Diastolic < 80 • Stage 1 Hypertension: Systolic 130-139 OR Diastolic 80-89 • Stage 2 Hypertension: Systolic ≥ 140 OR Diastolic ≥ 90 • Hypertensive Crisis: Systolic > 180 AND/OR Diastolic > 120 Note: The higher category applies when systolic and diastolic fall in different categories.
Result: Stage 1 Hypertension
Systolic of 135 falls in the 130-139 range (Stage 1) and diastolic of 85 falls in the 80-89 range (Stage 1). Both values therefore land in the Stage 1 category on this page. Diagnosis and treatment decisions still depend on repeated measurements and the broader cardiovascular context.
Blood pressure is recorded as systolic over diastolic, measured in millimeters of mercury (mmHg). This page simply maps those numbers to the standard adult category bands and applies the rule that the higher category wins when the two numbers disagree.
Blood pressure moves throughout the day. Stress, posture, activity, caffeine, pain, and measurement technique can all shift the result. That is why home logs, repeated clinic readings, or ambulatory monitoring matter more than one isolated number.
The calculator does not diagnose hypertension, estimate ASCVD risk, or decide whether medication is needed. It is a category reference tool designed to make a reading easier to label and track over time.
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This page classifies the entered systolic and diastolic values into the current adult blood-pressure categories used by AHA/ACC guidance and applies the higher category when the two numbers disagree. It is a category lookup, not a diagnostic workflow, so it does not average repeated measurements, calculate cardiovascular risk, or decide whether medication is indicated.
The result is best used as a reading aid for home-monitoring logs and counseling discussions. Hypertension diagnosis and treatment decisions still depend on repeated measurements, measurement technique, symptoms, and the broader clinical context.
The top number (systolic) measures pressure when your heart beats. The bottom number (diastolic) measures pressure when your heart rests between beats. Both numbers are important, but systolic pressure gets more attention in adults over 50 because it's a stronger predictor of cardiovascular events.
The AHA lowered the definition of Stage 1 Hypertension from 140/90 to 130/80 mmHg, based on evidence that cardiovascular risk increases significantly above this level. This reclassified approximately 31 million Americans as having hypertension.
Yes, blood pressure naturally fluctuates by 20-30 mmHg during the day. It's typically lowest during sleep and highest in the early morning. Stress, physical activity, caffeine, and meals also cause temporary changes. That's why multiple readings are needed.
White coat hypertension occurs when readings are elevated at the doctor's office but normal at home. It affects 15-30% of people. Home monitoring or ambulatory blood pressure monitoring can help distinguish true hypertension from white coat effect.
A reading above 180/120 is considered a hypertensive crisis. If you also have symptoms like severe headache, chest pain, vision changes, difficulty breathing, or numbness, call emergency services immediately. If you have no symptoms, wait 5 minutes and remeasure before calling your doctor.
The DASH diet, reducing sodium intake, regular aerobic exercise, maintaining a healthy weight, limiting alcohol, and managing stress are common non-pharmacologic measures discussed in blood pressure care. The right plan depends on the broader clinical picture and should not be set from one category result alone.