🫀 Blood Pressure Calculator
Enter systolic and diastolic blood pressure to get classification, mean arterial pressure (MAP), and pulse pressure.
ACC/AHA 2017 Blood Pressure Classification
| Category | Systolic | Diastolic |
|---|---|---|
| 🔵 Hypotension | < 90 | < 60 |
| 🟢 Normal | < 120 | < 80 |
| 🟡 Elevated | 120–129 | < 80 |
| 🟠 Stage 1 Hypertension | 130–139 | 80–89 |
| 🔴 Stage 2 Hypertension | ≥ 140 | ≥ 90 |
| 🟣 Hypertensive Crisis | ≥ 180 | ≥ 120 |
Note: ESC/ESH 2023 uses slightly different thresholds (Stage 1 HTN ≥ 140/90). ACC/AHA is shown above.
About Blood Pressure
Blood pressure is the force exerted on arterial walls. Systolic pressure reflects peak pressure during ventricular contraction; diastolic pressure reflects the resting baseline between beats. Units are mmHg.
Hypertension is a leading modifiable risk factor for myocardial infarction, stroke, heart failure, and chronic kidney disease. Diagnosis requires at least two measurements on separate days.
✅ Action Guide by BP Category
🔵 Hypotension — < 90/60 mmHg
If symptomatic (dizziness, syncope, fatigue), evaluate for dehydration, medication effect, adrenal insufficiency. Rise slowly from sitting or lying down.
🟢 Normal — < 120/80 mmHg
Healthy BP. Continue current lifestyle and recheck annually in adults.
🟡 Elevated — 120–129 / < 80 mmHg
Lifestyle intervention: DASH diet, sodium < 2.3 g/day (ideal < 1.5 g), physical activity 90–150 min/week, weight loss, limit alcohol. Recheck in 3–6 months.
🟠 Stage 1 — 130–139 / 80–89 mmHg
Mandatory lifestyle change. Start pharmacotherapy if ASCVD, diabetes, CKD, or 10-year ASCVD risk ≥ 10%. First-line agents: thiazide, ACEi/ARB, CCB.
🔴 Stage 2 — ≥ 140/90 mmHg
Pharmacotherapy + lifestyle. Typically start with two agents from different classes. Recheck within 1 month.
🟣 Hypertensive Crisis — ≥ 180/120 mmHg
⚠️ Emergency. With symptoms (chest pain, dyspnea, neurological deficit, vision change) → emergency department immediately for hypertensive emergency management. Without symptoms → prompt outpatient reassessment and medication adjustment.
🔗 Next Steps
- → LDL cholesterol — hypertension + dyslipidemia compounds ASCVD risk
- → HbA1c — diabetes is common in hypertensive patients
- → eGFR — screen for hypertensive nephropathy
- → Preeclampsia risk — BP monitoring in pregnancy
Disclaimer — A single reading should not be used for diagnosis. Confirm hypertension with at least two measurements on separate days, or with ambulatory/home BP monitoring. Consult your physician for management.
References: Whelton PK et al. 2017 ACC/AHA Guideline for Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults. Hypertension. 2018.
References: Whelton PK et al. 2017 ACC/AHA Guideline for Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults. Hypertension. 2018.