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Blood Pressure Category Classifier

Enter systolic and diastolic in mmHg to get the ACC/AHA stage: hypotension under 90/60, normal, elevated, stage 1 at 130/80, crisis at 180/120.

Classificação

Why 130 over 80 changed names

You measured 132 over 84 and the monitor offers no opinion about it. Part of the frustration is that the answer was renamed partway through: until 2017 that pair was called prehypertension, and after the American revision it became stage 1 hypertension. Typing both numbers here returns one band label, nothing more. No history, no averaging across readings, no clinical context.

The scale used is the American one, from the 2017 ACC/AHA consensus. From 180 or 120 up it is a hypertensive crisis; 140 or 90, stage 2; 130 or 80, stage 1; systolic 120 to 129 with diastolic under 80 is elevated; under 90 or under 60, hypotension. Either number crossing a cutoff is enough to bump the category. Worth knowing that the Brazilian SBC guideline still calls 130 over 80 prehypertension and reserves hypertension for 140 over 90. Labels are printed in Portuguese.

One quirk in the order of tests: the hypotension check comes last, so 125 over 50 shows up as elevated and the low diastolic slips through unmentioned. Blood pressure is also not classified from a single reading. Protocol asks for repeats on different days, seated, arm supported at heart level, with no coffee or cigarette in the previous half hour. Use the page to see which band a number falls in, never to start or stop medication. Everything is computed in the browser.

Frequently asked questions

Is 120 over 80 normal?
Not on this scale: 120 already counts as elevated, because the normal band ends at 119. Under the Brazilian guideline the same reading would still be normal.
What if only the top number is high?
Either value crossing the cutoff raises the category. Isolated systolic elevation is common after 60 and counts the same way.
Does the tool store my readings?
No. It classifies one pair at a time and saves nothing. Keep a separate log if you want to track an average.

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