Blood Pressure Interpreter
Beyond classification — what your blood pressure reveals about cardiovascular and metabolic health, and the levers that move it.
Your blood pressure
Enter your systolic (top number) and diastolic (bottom number) from your most recent reading.
For the most accurate reading, sit quietly for 5 minutes before measuring. Blood pressure naturally fluctuates throughout the day.
Medications that may affect your reading
ACE inhibitors (lisinopril, enalapril, ramipril) lower blood pressure by relaxing blood vessels. Your reading reflects the medicated state — your unmedicated pressure would likely be higher.
ARBs (losartan, valsartan, irbesartan) work similarly to ACE inhibitors by blocking angiotensin receptors. Same principle — your reading reflects the effect of the medication.
Calcium channel blockers (amlodipine, diltiazem, verapamil) lower blood pressure by relaxing arterial walls. Some also slow heart rate. Your reading reflects the combined effect.
Diuretics (hydrochlorothiazide, chlorthalidone, furosemide) lower blood pressure by reducing blood volume through increased urination. Readings may also be affected by hydration status.
NSAIDs (ibuprofen, naproxen) can raise blood pressure by promoting sodium retention and reducing the effectiveness of antihypertensive medications. Regular NSAID use can elevate your reading.
If you are taking blood pressure medications, your results reflect the medicated state. Discuss trends and targets with your healthcare provider.
About this tool
Classification
Based on AHA/ACC 2017 guidelines (maintained in 2025 update). Optimal (<110/70) and Healthy Range (110-119/70-79) are LLX sub-divisions of the AHA "Normal" category (<120/80), providing more granularity. Elevated: 120-129/<80. Stage 1: 130-139 or 80-89. Stage 2: ≥140 or ≥90. Hypertensive crisis: >180 and/or >120.
Classification Logic
When systolic and diastolic fall in different categories, the higher-risk reading determines the classification. This follows AHA guidance — a systolic of 125 with a diastolic of 92 is classified as Stage 2, not Elevated.
Known Limitations
A single office reading is the least reliable way to assess blood pressure. White coat hypertension (elevated readings in clinical settings) affects up to 30% of people. Home monitoring averages across multiple readings on different days are more informative. Blood pressure has significant diurnal variation — morning readings are typically higher. Arm position, cuff size, recent caffeine, and bladder fullness all affect accuracy.
Women and Cardiovascular Risk
Women's cardiovascular risk has historically been underestimated using standard assessment tools developed primarily on male populations. Women may experience cardiovascular consequences at lower blood pressure thresholds than men, and symptoms of cardiovascular disease often present differently. Elevated blood pressure during pregnancy (preeclampsia) is also a significant independent risk factor for future cardiovascular disease.
Sources
Whelton PK, et al. 2017 ACC/AHA Guideline for the Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults. Journal of the American College of Cardiology, 2018. 2025 AHA/ACC/Multisociety HBP Guideline update. Circulation, 2025.
Educational tool only. Not for diagnostic purposes. Consult a healthcare provider for medical decisions.