Blood Pressure & MAP Calculator 2025 — AHA Classification

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Blood Pressure Analyser

Uses 2017 AHA/ACC Hypertension Guidelines

Systolic (top number) — mmHg

Diastolic (bottom number) — mmHg

Heart Rate — bpm (optional)

When was reading taken?

Blood Pressure Analysis

Your BP

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mmHg

MAP

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mmHg

AHA Category

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Pulse Pressure—

MAP Assessment—

Cardiovascular Risk—

Reading Context—

OptimalNormalElevatedStage 1 HTNStage 2+

MAP = (Systolic + 2×Diastolic) ÷ 3. Normal MAP: 70–100 mmHg. Critical MAP: <60 mmHg (inadequate organ perfusion). AHA 2017 Categories: Normal <120/80 · Elevated 120–129/<80 · Stage 1 HTN 130–139/80–89 · Stage 2 HTN ≥140/≥90 · Crisis >180/>120.

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AHA Blood Pressure Categories

2017 American Heart Association / ACC Guidelines

Category	Systolic		Diastolic	Action
Normal	<120	AND	<80	Maintain healthy lifestyle
Elevated	120–129	AND	<80	Lifestyle changes advised
Stage 1 HTN	130–139	OR	80–89	Lifestyle changes; assess 10-yr CVD risk
Stage 2 HTN	≥140	OR	≥90	Lifestyle + medication likely needed
Hypertensive Crisis	>180	AND/OR	>120	Seek emergency care immediately

Understanding Your Blood Pressure Reading

Blood pressure is expressed as two numbers: systolic (pressure during heart contraction) over diastolic (pressure during heart relaxation). Both numbers matter — isolated systolic hypertension is particularly common in older adults and carries its own cardiovascular risk profile.

What Is Mean Arterial Pressure (MAP)?

MAP represents the average arterial pressure throughout one cardiac cycle and is the pressure that organs actually "see" for perfusion. A MAP below 60 mmHg indicates inadequate organ perfusion — a medical emergency. Normal MAP is 70–100 mmHg. MAP is calculated as: (Systolic + 2×Diastolic) ÷ 3 (because approximately ⅓ of the cardiac cycle is systole and ⅔ is diastole).

How to Take an Accurate Blood Pressure Reading

Sit quietly for 5 minutes before measuring — no caffeine, exercise, or tobacco for 30 minutes
Sit with back supported, feet flat, arm at heart level, cuff on bare skin
Take 2–3 readings 1–2 minutes apart — use the average of the last two
Measure at the same time daily (morning, before medications, is ideal)
One high reading is not hypertension — a pattern of elevated readings over weeks is

FAQ: My blood pressure is high at the doctor but normal at home — what does that mean?

This is called "White Coat Hypertension" — a well-documented phenomenon where blood pressure rises in clinical settings due to anxiety. It affects 15–30% of people diagnosed with hypertension in clinics. Home blood pressure monitoring with a validated device is more representative of your true resting blood pressure. Some research suggests white coat hypertension still carries some cardiovascular risk compared to truly normal blood pressure, so it warrants monitoring regardless.