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CalcWolf Health Blood Pressure Calculator
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Blood Pressure Category & Risk Assessment

Enter your systolic and diastolic readings to see your blood pressure category, risk level, and recommended actions.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

Blood Pressure Categories (AHA Guidelines)

Blood pressure is recorded as systolic/diastolic (e.g., 120/80 mmHg). Normal: Below 120/80. Elevated: 120-129 systolic AND less than 80 diastolic. High BP Stage 1: 130-139 systolic OR 80-89 diastolic. High BP Stage 2: 140+ systolic OR 90+ diastolic. Hypertensive Crisis: Above 180/120 — requires immediate medical attention. The higher category between systolic and diastolic determines your overall classification.

Accurate Blood Pressure Measurement

For accurate readings: sit quietly for 5 minutes before measuring, feet flat on floor, arm supported at heart level, no caffeine or exercise for 30 minutes prior. Take 2-3 readings 1 minute apart and average them. Home readings are often 5-10 points lower than office readings (white coat hypertension). A single high reading does not mean you have hypertension — diagnosis requires elevated readings on multiple occasions.

⚡ CalcWolf Insight

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Frequently asked questions
What is a normal blood pressure reading?
Below 120/80 mmHg is considered normal for adults. Optimal blood pressure is around 115/75. Blood pressure naturally rises with age — a 50-year-old with 125/82 is common but still classified as "Elevated." Regular monitoring and healthy lifestyle help maintain normal levels.
When should I worry about blood pressure?
Consistently above 130/80 warrants a doctor visit. Above 140/90 typically requires medication. Above 180/120 is a hypertensive crisis — seek immediate medical care if accompanied by symptoms like severe headache, chest pain, vision changes, or confusion. A single high reading during stress is not necessarily cause for alarm, but persistently elevated readings are.
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Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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