● Clinical health

Know your blood pressure classification instantly.

Enter up to three readings to get your averaged blood pressure, ACC/AHA 2017 classification, pulse pressure, MAP and a color-coded risk gauge — no equipment needed beyond a cuff.

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Blood Pressure — Classification & Risk

ACC/AHA 2017 guidelines · average up to 3 readings · MAP & pulse pressure

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Your readings

Number of readings

Systolic / Diastolic — in mmHg

Reading 1

SYS

DIA

Reading 2

SYS

DIA

Reading 3

SYS

DIA

Age — optional, for context

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Your result

— / — mmHg

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Enter your readings above

Average systolic mean of all readings—

Average diastolic mean of all readings—

Pulse pressure systolic − diastolic—

MAP mean arterial pressure—

Classification—

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How it's calculated

ACC/AHA 2017 — the classification most doctors use today

This calculator averages up to three blood pressure pairs and classifies the result using the American College of Cardiology / American Heart Association 2017 guideline thresholds. For example, an average of 128/78 mmHg is classified as Elevated (systolic 120–129, diastolic <80). An average of 142/92 mmHg falls into Stage 2 Hypertension (systolic ≥140 or diastolic ≥90).

In 2017, the ACC/AHA lowered the threshold for hypertension from 140/90 to 130/80 mmHg, meaning Stage 1 Hypertension now starts at 130 systolic or 80 diastolic. The classification uses whichever pressure (systolic or diastolic) places the reading in the higher category. Always use the average of at least two seated resting readings taken 1–2 minutes apart.

MAP = (Systolic + 2 × Diastolic) ÷ 3
Pulse Pressure = Systolic − Diastolic

1
Average all systolic readings
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2
Average all diastolic readings
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3
Compute MAP and pulse pressure
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4
Apply ACC/AHA 2017 classification
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Understand the terms

Systolic pressure: The higher number — the pressure in your arteries when the heart beats (contracts). Measured in mmHg.
Diastolic pressure: The lower number — the pressure in your arteries when the heart rests between beats.
Hypertension: Persistently elevated blood pressure. Under ACC/AHA 2017 guidelines, defined as ≥130/80 mmHg.
Pulse pressure: Systolic minus diastolic. A normal range is 40–60 mmHg. Wide pulse pressure (>60) may indicate arterial stiffness.
MAP (Mean Arterial Pressure): The average pressure in arteries during one cardiac cycle. Formula: (SYS + 2×DIA) ÷ 3. A MAP below 70 mmHg may indicate insufficient organ perfusion.

See the full glossary →

Warning: estimation tool for informational and planning purposes, based on ACC/AHA 2017 guidelines. Blood pressure varies with posture, time of day, stress, caffeine and other factors. A single set of readings does not diagnose hypertension. This calculator is not a medical device and does not replace evaluation by a physician or licensed healthcare provider.

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Frequently asked questions — Blood Pressure

What is a normal blood pressure reading?

According to the ACC/AHA 2017 guidelines, normal blood pressure is less than 120 mmHg systolic AND less than 80 mmHg diastolic. Values of 120–129 systolic with diastolic below 80 are classified as Elevated.

What is the difference between Stage 1 and Stage 2 Hypertension?

Stage 1 Hypertension is systolic 130–139 mmHg or diastolic 80–89 mmHg. Stage 2 Hypertension is systolic ≥140 mmHg or diastolic ≥90 mmHg. Both require lifestyle changes; Stage 2 often requires medication. The calculator assigns the higher of the two categories.

What is a Hypertensive Crisis?

A Hypertensive Crisis is blood pressure exceeding 180/120 mmHg. A Hypertensive Urgency has no organ damage; a Hypertensive Emergency involves organ damage (chest pain, shortness of breath, vision changes, severe headache). If your reading is above 180/120, seek emergency care immediately.

Why should I average multiple blood pressure readings?

Blood pressure fluctuates throughout the day due to stress, caffeine, posture, talking and other factors. The AHA recommends averaging at least two readings taken at the same time each day with a few minutes of rest beforehand. This calculator lets you enter and average up to three pairs of readings.

What is Mean Arterial Pressure (MAP) and why does it matter?

MAP is the average pressure in arteries throughout one cardiac cycle. It is calculated as (Systolic + 2 × Diastolic) ÷ 3. A MAP below 70 mmHg suggests poor organ perfusion; values above 100 mmHg are associated with increased cardiovascular risk. Clinicians use MAP when managing critically ill patients or adjusting antihypertensive medications.

📚 Learn more — official sources

📋 Guideline ACC/AHA 2017 — High Blood Pressure Clinical Practice Guideline The landmark 2017 guideline that lowered the hypertension threshold to 130/80 mmHg and redefined the five blood pressure categories used by this calculator. See official guideline → 🏛️ Organization American Heart Association — Understanding Blood Pressure Readings Patient-friendly explanation of the five blood pressure categories, how to measure at home correctly, and when to see a doctor. See official source → 🏛️ Organization WHO — Hypertension Fact Sheet World Health Organization overview of hypertension epidemiology, risk factors, prevention and the global burden of cardiovascular disease. See official source → 📋 Guideline ESC/ESH 2018 — Guidelines for the Management of Arterial Hypertension European Society of Cardiology and European Society of Hypertension joint guidelines covering diagnosis, risk stratification and treatment of hypertension. See official guideline →

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About the Blood Pressure Calculator

This Blood Pressure Calculator classifies your reading using the ACC/AHA 2017 High Blood Pressure Clinical Practice Guidelines — the most widely adopted standard in the United States and many other countries. Unlike the older 140/90 threshold, the 2017 guidelines define hypertension as 130/80 mmHg or higher, reflecting evidence that cardiovascular risk rises significantly above those values.

Enter up to three pairs of systolic/diastolic readings and the calculator averages them before applying the classification. It also computes Mean Arterial Pressure (MAP) — used clinically to assess organ perfusion — and pulse pressure, a marker of arterial stiffness. Results are displayed on a color-coded gauge for quick visual reference. Always confirm any concerning readings with a healthcare provider.