Blood Pressure Category Checker

Enter your systolic and diastolic values to see your blood pressure category per the AHA 2017 guideline or the ESC/ESH 2023 European guideline — with visual scale, urgent-care warning if in the hypertensive-crisis range, and notes on white-coat and masked hypertension.

Systolic (top number)

mm Hg

Diastolic (bottom number)

mm Hg

Guideline set

systolic / diastolic — mm Hg

Guideline applied --

Driven by --

Single office readings are not a diagnosis. Major guidelines recommend multiple readings across different days, ideally with home or ambulatory monitoring, before confirming hypertension. Always discuss concerning values with your doctor.

How Blood Pressure Is Classified

Blood pressure is reported as two numbers: systolic (the peak pressure during heart contraction) and diastolic (the pressure between beats), both in millimetres of mercury (mm Hg). Two major guideline frameworks are in use globally — the ACC/AHA 2017 guideline, still the reference standard in the United States through 2026, and the ESC/ESH 2023 European guideline used across most of Europe. Both agree that lower is generally better; they differ in where they set the diagnostic line for hypertension.

AHA 2017 Categories

Category	Systolic (mm Hg)		Diastolic (mm Hg)
Normal	< 120	AND	< 80
Elevated	120 – 129	AND	< 80
Stage 1 Hypertension	130 – 139	OR	80 – 89
Stage 2 Hypertension	≥ 140	OR	≥ 90
Hypertensive Crisis	> 180	AND/OR	> 120

ESC/ESH 2023 Categories

Category	Systolic (mm Hg)		Diastolic (mm Hg)
Optimal	< 120	AND	< 80
Normal	120 – 129	AND/OR	80 – 84
High-normal	130 – 139	AND/OR	85 – 89
Grade 1 Hypertension	140 – 159	AND/OR	90 – 99
Grade 2 Hypertension	160 – 179	AND/OR	100 – 109
Grade 3 Hypertension	≥ 180	AND/OR	≥ 110

Sources: Whelton PK et al., Hypertension 2018 (ACC/AHA 2017 guideline); Mancia G et al., Journal of Hypertension 2023 (ESC/ESH 2023 guideline).

Why the Two Guidelines Differ

The AHA 2017 guideline lowered the diagnostic threshold for hypertension from 140/90 to 130/80 in part on the basis of the SPRINT trial, which showed cardiovascular benefit from more intensive blood pressure lowering in a high-risk population. The ESC/ESH 2023 guideline weighed the same evidence but kept 140/90 as the diagnostic cutoff, classifying 130–139/85–89 as "high-normal" rather than hypertension. Both frameworks agree that lifestyle change matters throughout the 120–139/80–89 range, and both agree on when medication is generally warranted for higher-risk individuals; they label the categories differently. A person with a reading of 135/85 is "Stage 1 hypertensive" in the US and "high-normal" in Europe — the underlying cardiovascular risk is the same.

Hypertensive Crisis

A reading above 180/120 mm Hg is considered a hypertensive crisis by both major guideline bodies. The AHA distinguishes between hypertensive urgency (very high blood pressure without acute target-organ damage) and hypertensive emergency (very high blood pressure with evidence of acute organ damage such as chest pain, breathlessness, severe headache, neurological deficit, or visual changes). If your reading is above 180/120 and you have any of these symptoms, seek emergency care immediately. If your reading is above 180/120 and you have no symptoms, rest for five minutes and remeasure; if it remains elevated, contact your doctor or urgent care the same day.

Measuring Correctly Matters

Guideline-based classification assumes the reading was taken properly. Key rules from AHA 2017 and ESC/ESH 2023:

Rest for 5 minutes before measuring. No caffeine, smoking, or exercise for 30 minutes beforehand.
Sit upright with back supported, feet flat on the floor, legs uncrossed.
Arm at heart level, supported (not held up). Rolling a sleeve too tight can inflate readings.
Use a validated upper-arm device. Wrist and finger devices are less reliable.
Correct cuff size. A cuff too small for your upper-arm circumference will over-estimate blood pressure substantially. Measure your arm and check the device's cuff sizing.
Do not talk during the reading.
Take two readings one minute apart and record the average.

White-Coat and Masked Hypertension

White-coat hypertension refers to elevated blood pressure in the clinic but normal readings at home — often driven by transient stress responses. It can lead to over-diagnosis and over-treatment. Masked hypertension is the opposite: normal in the clinic, elevated at home — a pattern that carries cardiovascular risk similar to sustained hypertension but is easy to miss. Both guidelines recommend out-of-office confirmation — either home monitoring (typically 7 days of morning and evening readings) or 24-hour ambulatory monitoring — before confirming a hypertension diagnosis, especially when clinic readings are borderline.

Home monitoring thresholds are slightly different from clinic thresholds. AHA 2017 and ESC/ESH 2023 generally consider a home daytime average of 135/85 mm Hg or higher, or a 24-hour ambulatory average of 130/80 mm Hg or higher, as consistent with hypertension.

When to See a Doctor Immediately

Seek emergency care if you measure a reading above 180/120 mm Hg and have any of: severe headache, chest pain or pressure, severe back pain, shortness of breath, numbness or weakness on one side, difficulty speaking, visual changes, severe anxiety, or blood in the urine. These can be signs of acute organ damage from severely elevated blood pressure.

Frequently Asked Questions

What is considered a normal blood pressure?

Under the American College of Cardiology / American Heart Association 2017 guideline, normal blood pressure is defined as systolic below 120 mm Hg and diastolic below 80 mm Hg. Values from 120 to 129 systolic with diastolic below 80 are called elevated. Stage 1 hypertension starts at 130 to 139 systolic or 80 to 89 diastolic, and Stage 2 at 140/90 or higher. The European Society of Cardiology / European Society of Hypertension 2023 guideline keeps 120/80 as a normal benchmark and diagnoses hypertension at 140/90 or higher rather than 130/80.

Why do AHA 2017 and ESC 2023 differ on hypertension thresholds?

The two guidelines weigh the SPRINT trial differently. The AHA 2017 guideline adopted a lower diagnostic threshold of 130/80 for office-measured hypertension, partly on the basis of SPRINT. The ESC/ESH 2023 guideline kept the traditional 140/90 cutoff for a hypertension diagnosis, while recommending that lifestyle-based management begin earlier at 120-139/70-89 — a category they call "high-normal" or, in later ESC 2024 arterial hypertension guidance, "Elevated blood pressure". Both guidelines agree that lower is generally better and that medication choice should reflect individual risk.

What is a hypertensive crisis?

A hypertensive crisis is a blood pressure reading above 180/120 mm Hg. The AHA distinguishes hypertensive urgency (very high blood pressure without signs of acute organ damage) from hypertensive emergency (very high blood pressure with evidence of organ damage, such as chest pain, breathlessness, severe headache, confusion, visual changes, weakness, or difficulty speaking). If your reading is above 180/120 and you have any of these symptoms, seek emergency medical care immediately. If you have no symptoms, rest for five minutes and remeasure; if the reading remains above 180/120, contact your doctor or urgent care.

What is white-coat hypertension?

White-coat hypertension describes blood pressure that is elevated when measured in a clinic or doctor's office but normal when measured at home or with ambulatory monitoring. It is common and estimated to affect a meaningful minority of people diagnosed with hypertension on office readings. Because it can inflate apparent cardiovascular risk and lead to over-treatment, major guidelines (AHA 2017 and ESC/ESH 2023) emphasise out-of-office measurement — home monitoring or 24-hour ambulatory monitoring — before confirming a hypertension diagnosis.

What is masked hypertension?

Masked hypertension is the opposite of white-coat: blood pressure is normal in the clinic but elevated at home or on ambulatory monitoring. It is important because it carries cardiovascular risk comparable to sustained hypertension, but is easy to miss because office readings look fine. People whose daytime home average is above 135/85 mm Hg or whose 24-hour ambulatory average is above 130/80 mm Hg may have masked hypertension even with a clean office reading, per AHA 2017 and ESC/ESH 2023 guidance.

How often should I measure my blood pressure at home?

Major guidelines recommend measuring twice in the morning and twice in the evening for 7 consecutive days when assessing whether hypertension is present or whether treatment is working, then averaging the results — ignoring the first day. For ongoing monitoring once a diagnosis is established, cadence depends on stability. Single isolated readings are unreliable; a trend over multiple days is far more informative. Always use a validated upper-arm device, correct cuff size, and measure after five minutes of quiet rest.

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Medical Disclaimer: This blood pressure category checker is provided for educational and informational purposes only. A single reading does not diagnose hypertension. Blood pressure categories and treatment decisions should be made with a healthcare provider on the basis of multiple readings, ideally confirmed by home or ambulatory monitoring. If your reading is above 180/120 mm Hg and you have chest pain, severe headache, breathlessness, weakness, or visual changes, seek emergency care immediately. This tool does not constitute medical advice.

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