READING LOOKUP

Blood pressure 128 over 50 to 110

A top number of 128 is in the Elevated range. The bottom number decides the rest: under 80 stays Elevated, 80 to 89 is Stage 1, and 90 or higher is Stage 2.

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

128 over what? The quick answer

128/50 to 79: Elevated
128/80 to 89: Stage 1 hypertension
128/90 to 110: Stage 2 hypertension

Every 128 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.

Reading	Category	Pulse pressure	MAP
128/50	Elevated	78	76
128/51	Elevated	77	76.7
128/52	Elevated	76	77.3
128/53	Elevated	75	78
128/54	Elevated	74	78.7
128/55	Elevated	73	79.3
128/56	Elevated	72	80
128/57	Elevated	71	80.7
128/58	Elevated	70	81.3
128/59	Elevated	69	82
128/60	Elevated	68	82.7
128/61	Elevated	67	83.3
128/62	Elevated	66	84
128/63	Elevated	65	84.7
128/64	Elevated	64	85.3
128/65	Elevated	63	86
128/66	Elevated	62	86.7
128/67	Elevated	61	87.3
128/68	Elevated	60	88
128/69	Elevated	59	88.7
128/70	Elevated	58	89.3
128/71	Elevated	57	90
128/72	Elevated	56	90.7
128/73	Elevated	55	91.3
128/74	Elevated	54	92
128/75	Elevated	53	92.7
128/76	Elevated	52	93.3
128/77	Elevated	51	94
128/78	Elevated	50	94.7
128/79	Elevated	49	95.3
128/80	Stage 1	48	96
128/81	Stage 1	47	96.7
128/82	Stage 1	46	97.3
128/83	Stage 1	45	98
128/84	Stage 1	44	98.7
128/85	Stage 1	43	99.3
128/86	Stage 1	42	100
128/87	Stage 1	41	100.7
128/88	Stage 1	40	101.3
128/89	Stage 1	39	102
128/90	Stage 2	38	102.7
128/91	Stage 2	37	103.3
128/92	Stage 2	36	104
128/93	Stage 2	35	104.7
128/94	Stage 2	34	105.3
128/95	Stage 2	33	106
128/96	Stage 2	32	106.7
128/97	Stage 2	31	107.3
128/98	Stage 2	30	108
128/99	Stage 2	29	108.7
128/100	Stage 2	28	109.3
128/101	Stage 2	27	110
128/102	Stage 2	26	110.7
128/103	Stage 2	25	111.3
128/104	Stage 2	24	112
128/105	Stage 2	23	112.7
128/106	Stage 2	22	113.3
128/107	Stage 2	21	114
128/108	Stage 2	20	114.7
128/109	Stage 2	19	115.3
128/110	Stage 2	18	116

What to do with a 128 reading

Keep checking now and then, the same way each time. Your category comes from the average of many home readings, so one number tells you less than a week of them.

With a bottom number of 80 or higher, the reading is at or above 130/80. In that case: 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 128/70 high blood pressure?

128/70 is in the Elevated range of the 2025 ACC/AHA chart, with a top number of 120 to 129 and a bottom number under 80. One reading is a snapshot: the guideline places you by the average of readings taken on separate occasions.

Is 128/80 high blood pressure?

128/80 is in the Stage 1 hypertension range of the 2025 ACC/AHA chart, because the bottom number is 80 to 89. One reading is a snapshot: the guideline places you by the average of readings taken on separate occasions.

Is 128/90 high blood pressure?

128/90 is in the Stage 2 hypertension range of the 2025 ACC/AHA chart, because the bottom number is 90 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 128/80?

About 96 mmHg. Mean arterial pressure is the bottom number plus a third of the pulse pressure: 80 + 48/3. The pulse pressure is 48.

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.

SOURCES

Jones DW, et al. 2025 AHA/ACC/AANP/AAPA/ABC/ACCP/ACPM/AGS/AMA/ASPC/NMA/PCNA/SGIM Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults (Circulation, 2025): Blood pressure categories (normal under 120/80, elevated 120 to 129 and under 80, stage 1 130 to 139 or 80 to 89, stage 2 140 or 90 and higher); the higher category counts when the two numbers disagree; severe hypertension above 180/120; PREVENT for risk estimation
Understanding Blood Pressure Readings (American Heart Association, reviewed August 14, 2025): Category chart for adults; severe hypertension and hypertensive emergency rows; call 911 above 180/120 with symptoms

Track this automatically with BP Log.

The free iPhone app times two readings a minute apart, averages them, keeps your morning and evening numbers apart, and builds a report for your doctor.

Other ways to track: printable log now, desktop and Excel coming soon