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Blood pressure 171 over 50 to 110

A top number of 171 is in the Stage 2 range on its own, so every 171 reading counts as Stage 2 whatever the bottom number.

Reviewed by Kaustubh Dabhadkar, MD, MPH, FACC, board-certified cardiologist. Categories follow the 2025 ACC/AHA guideline for adults.

171 over what? The quick answer

  • 171/50 to 110: Stage 2 hypertension

Every 171 reading

Pulse pressure is the top number minus the bottom number. MAP (mean arterial pressure) is the bottom number plus a third of the pulse pressure.

ReadingCategoryPulse pressureMAP
171/50Stage 212190.3
171/51Stage 212091
171/52Stage 211991.7
171/53Stage 211892.3
171/54Stage 211793
171/55Stage 211693.7
171/56Stage 211594.3
171/57Stage 211495
171/58Stage 211395.7
171/59Stage 211296.3
171/60Stage 211197
171/61Stage 211097.7
171/62Stage 210998.3
171/63Stage 210899
171/64Stage 210799.7
171/65Stage 2106100.3
171/66Stage 2105101
171/67Stage 2104101.7
171/68Stage 2103102.3
171/69Stage 2102103
171/70Stage 2101103.7
171/71Stage 2100104.3
171/72Stage 299105
171/73Stage 298105.7
171/74Stage 297106.3
171/75Stage 296107
171/76Stage 295107.7
171/77Stage 294108.3
171/78Stage 293109
171/79Stage 292109.7
171/80Stage 291110.3
171/81Stage 290111
171/82Stage 289111.7
171/83Stage 288112.3
171/84Stage 287113
171/85Stage 286113.7
171/86Stage 285114.3
171/87Stage 284115
171/88Stage 283115.7
171/89Stage 282116.3
171/90Stage 281117
171/91Stage 280117.7
171/92Stage 279118.3
171/93Stage 278119
171/94Stage 277119.7
171/95Stage 276120.3
171/96Stage 275121
171/97Stage 274121.7
171/98Stage 273122.3
171/99Stage 272123
171/100Stage 271123.7
171/101Stage 270124.3
171/102Stage 269125
171/103Stage 268125.7
171/104Stage 267126.3
171/105Stage 266127
171/106Stage 265127.7
171/107Stage 264128.3
171/108Stage 263129
171/109Stage 262129.7
171/110Stage 261130.3

What to do with a 171 reading

Sit quietly for 5 minutes and take two readings a minute apart. If home readings average in this range over a week, share them with your doctor, who will look at them alongside your overall heart risk.

Readings move from minute to minute, and the first one usually runs a few points higher. The home measuring guide covers how to get a reading you can trust, and the 7-day home average turns a week of readings into the number your doctor uses. To check any reading, use the category checker.

Common questions

Is 171/70 high blood pressure?

171/70 is in the Stage 2 hypertension range of the 2025 ACC/AHA chart, because the top number is 140 or higher. One reading is a snapshot: the guideline places you by the average of readings taken on separate occasions.

Is 171/80 high blood pressure?

171/80 is in the Stage 2 hypertension range of the 2025 ACC/AHA chart, because the top number is 140 or higher. One reading is a snapshot: the guideline places you by the average of readings taken on separate occasions.

Is 171/90 high blood pressure?

171/90 is in the Stage 2 hypertension range of the 2025 ACC/AHA chart, because the top number is 140 or higher. One reading is a snapshot: the guideline places you by the average of readings taken on separate occasions.

What is the MAP of 171/80?

About 110.3 mmHg. Mean arterial pressure is the bottom number plus a third of the pulse pressure: 80 + 91/3. The pulse pressure is 91.

This page is educational and does not provide medical advice, diagnosis, or treatment. Categories describe numbers for adults; they are not a diagnosis, and they are not a substitute for care from your own doctor.
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