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Blood pressure 173 over 50 to 110

A top number of 173 is in the Stage 2 range on its own, so every 173 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.

173 over what? The quick answer

  • 173/50 to 110: Stage 2 hypertension

Every 173 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
173/50Stage 212391
173/51Stage 212291.7
173/52Stage 212192.3
173/53Stage 212093
173/54Stage 211993.7
173/55Stage 211894.3
173/56Stage 211795
173/57Stage 211695.7
173/58Stage 211596.3
173/59Stage 211497
173/60Stage 211397.7
173/61Stage 211298.3
173/62Stage 211199
173/63Stage 211099.7
173/64Stage 2109100.3
173/65Stage 2108101
173/66Stage 2107101.7
173/67Stage 2106102.3
173/68Stage 2105103
173/69Stage 2104103.7
173/70Stage 2103104.3
173/71Stage 2102105
173/72Stage 2101105.7
173/73Stage 2100106.3
173/74Stage 299107
173/75Stage 298107.7
173/76Stage 297108.3
173/77Stage 296109
173/78Stage 295109.7
173/79Stage 294110.3
173/80Stage 293111
173/81Stage 292111.7
173/82Stage 291112.3
173/83Stage 290113
173/84Stage 289113.7
173/85Stage 288114.3
173/86Stage 287115
173/87Stage 286115.7
173/88Stage 285116.3
173/89Stage 284117
173/90Stage 283117.7
173/91Stage 282118.3
173/92Stage 281119
173/93Stage 280119.7
173/94Stage 279120.3
173/95Stage 278121
173/96Stage 277121.7
173/97Stage 276122.3
173/98Stage 275123
173/99Stage 274123.7
173/100Stage 273124.3
173/101Stage 272125
173/102Stage 271125.7
173/103Stage 270126.3
173/104Stage 269127
173/105Stage 268127.7
173/106Stage 267128.3
173/107Stage 266129
173/108Stage 265129.7
173/109Stage 264130.3
173/110Stage 263131

What to do with a 173 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 173/70 high blood pressure?

173/70 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 173/80 high blood pressure?

173/80 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 173/90 high blood pressure?

173/90 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 173/80?

About 111 mmHg. Mean arterial pressure is the bottom number plus a third of the pulse pressure: 80 + 93/3. The pulse pressure is 93.

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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