Blood Pressure Category Calculator — evidence-based tool to check your blood pressure category. Includes formula, tips, and interpretation guide.
AHA / ACC 2017 Classification: 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 OR diastolic > 120.
Mean Arterial Pressure (MAP) = (Systolic + 2 × Diastolic) ÷ 3. Normal MAP: 70–100 mmHg. A MAP below 60 mmHg indicates insufficient blood flow to vital organs. Pulse Pressure = Systolic − Diastolic. Normal: 40 mmHg. A wide pulse pressure (> 60 mmHg) may indicate arterial stiffness; a narrow pulse pressure (< 25 mmHg) may indicate reduced cardiac output.
Worked example: reading 128/82 → Elevated (systolic 120–129, diastolic < 80 fails because diastolic is 82, so this is Stage 1). MAP = (128 + 164) ÷ 3 = 97 mmHg (upper-normal). Pulse pressure = 46 mmHg (normal).