Blood Pressure Classifier

Systolic + diastolic → normal, elevated, hypertension or crisis

Classify adult blood pressure readings with ACC/AHA 2017 categories and show the JNC 8 reference threshold for the selected context.

Important notice

This tool is educational and does not diagnose or replace medical evaluation. Clinical decisions depend on repeated readings, measurement technique, age, cardiovascular risk and history.

Systolic pressure

mmHg

Diastolic pressure

mmHg

JNC 8 context

Result

ACC/AHA 2017

Elevated blood pressure

120-129 and <80 mmHg

Reading used

128/78 mmHg

Pulse pressure

50 mmHg

Systolic pressure is elevated while diastolic remains below 80.

Lifestyle changes and follow-up are commonly recommended.

JNC 8

JNC 8 focuses on treatment thresholds and goals, not the same classification labels.

Adult under 60 years

>=140/90 mmHg

Goal: <140/90 mmHg

Classification basis

ACC/AHA 2017 defines adult blood pressure categories. JNC 8 provides treatment thresholds and goals by age and comorbidity.

ACC/AHA 2017 guideline JNC 8 guideline in JAMA

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Before interpreting

Use the right cuff size, rest for 5 minutes and avoid talking during measurement.
A single high reading does not always confirm hypertension; guidelines use averages from repeated measurements.
The category is determined by the higher-risk value: systolic or diastolic.
JNC 8 is a treatment guideline; ACC/AHA 2017 is the classification used here.

How it works

1Enter systolic pressure, the top number.
2Enter diastolic pressure, the bottom number.
3Choose the JNC 8 context to see the treatment threshold.
4Review the ACC/AHA category and safety warning if shown.

Frequently asked questions

Blood pressure classifier: ranges and normal values

Blood pressure is the force blood exerts on artery walls, expressed with two values: systolic (heart contracting) and diastolic (at rest). Knowing its ranges is key to cardiovascular health.

Classification according to the American Heart Association

Normal: systolic <120 and diastolic <80 mmHg.
Elevated: systolic 120–129 and diastolic <80 mmHg.
Hypertension stage 1: systolic 130–139 or diastolic 80–89 mmHg.
Hypertension stage 2: systolic ≥140 or diastolic ≥90 mmHg.
Hypertensive crisis: >180/120 mmHg (medical emergency).

How to measure correctly

Rest 5 minutes before, sit with back supported and arm at heart level. Avoid caffeine and tobacco 30 minutes before. Take two readings and record the average.

Hypertension: the silent killer

It rarely produces symptoms until causing serious damage. Measure regularly. A healthy lifestyle can reduce blood pressure 5–10 mmHg without medication.

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