Blood Pressure Categories: What the Bands Mean

The AHA/ACC 2025 Categories

The American Heart Association and American College of Cardiology use four bands. Both numbers matter, and a reading is placed in the higher of the two bands its numbers point to.

There is one asymmetry worth knowing, because it is commonly got wrong: Elevated is triggered by the systolic number alone. If your diastolic reaches 80, the reading is Stage 1 even when systolic is still in the 120–129 range.

The ESC 2024 Categories

The European Society of Cardiology uses three bands and different cut-offs, so the same reading can sit in a different category depending on which standard you are looking at.

Two differences stand out. The ESC diastolic axis starts at 70, not 80. And unlike AHA/ACC, the Elevated band is triggered symmetrically from either number, with no systolic-only rule.

These are office thresholds. Readings taken at home are often slightly lower than readings taken in a clinic, which is part of why a home log is useful in the first place.

Choosing a Standard, and When to Get Help Now

BPal picks a default from your device region — AHA/ACC 2025 in the United States, ESC 2024 elsewhere — and you can change it in Settings at any time. It is always labelled explicitly rather than presented as “your local standard”. Use whichever one your own clinician uses, so your app and your consultation are talking about the same bands.

Switching standards does not change your readings. It changes the boundaries drawn on your charts, the colours on your history, and the threshold used for the percentage in your distribution card and reports.

Separately from the bands, BPal flags any reading where systolic is over 180, or diastolic is over 120. Published guidance treats readings in that range as needing prompt attention. If you record one, or if you have symptoms such as chest pain, shortness of breath, weakness, vision changes or trouble speaking, contact emergency services rather than waiting for your next appointment.

For everything below that, remember that a single reading cannot diagnose hypertension. Diagnosis rests on repeated readings under proper conditions, interpreted by a clinician. This guide is general information, not medical advice, and your doctor sets your own targets.