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Blood pressure 170 over 50 to 110

A top number of 170 is in the Stage 2 range on its own, so every 170 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.

170 over what? The quick answer

  • 170/50 to 110: Stage 2 hypertension

Every 170 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
170/50Stage 212090
170/51Stage 211990.7
170/52Stage 211891.3
170/53Stage 211792
170/54Stage 211692.7
170/55Stage 211593.3
170/56Stage 211494
170/57Stage 211394.7
170/58Stage 211295.3
170/59Stage 211196
170/60Stage 211096.7
170/61Stage 210997.3
170/62Stage 210898
170/63Stage 210798.7
170/64Stage 210699.3
170/65Stage 2105100
170/66Stage 2104100.7
170/67Stage 2103101.3
170/68Stage 2102102
170/69Stage 2101102.7
170/70Stage 2100103.3
170/71Stage 299104
170/72Stage 298104.7
170/73Stage 297105.3
170/74Stage 296106
170/75Stage 295106.7
170/76Stage 294107.3
170/77Stage 293108
170/78Stage 292108.7
170/79Stage 291109.3
170/80Stage 290110
170/81Stage 289110.7
170/82Stage 288111.3
170/83Stage 287112
170/84Stage 286112.7
170/85Stage 285113.3
170/86Stage 284114
170/87Stage 283114.7
170/88Stage 282115.3
170/89Stage 281116
170/90Stage 280116.7
170/91Stage 279117.3
170/92Stage 278118
170/93Stage 277118.7
170/94Stage 276119.3
170/95Stage 275120
170/96Stage 274120.7
170/97Stage 273121.3
170/98Stage 272122
170/99Stage 271122.7
170/100Stage 270123.3
170/101Stage 269124
170/102Stage 268124.7
170/103Stage 267125.3
170/104Stage 266126
170/105Stage 265126.7
170/106Stage 264127.3
170/107Stage 263128
170/108Stage 262128.7
170/109Stage 261129.3
170/110Stage 260130

What to do with a 170 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 170/70 high blood pressure?

170/70 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 170/80 high blood pressure?

170/80 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 170/90 high blood pressure?

170/90 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 170/80?

About 110 mmHg. Mean arterial pressure is the bottom number plus a third of the pulse pressure: 80 + 90/3. The pulse pressure is 90.

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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