READING LOOKUP

Blood pressure 108 over 50 to 93

A top number of 108 is in the Normal range. The bottom number decides the rest: under 80 stays Normal, 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.

108 over what? The quick answer

108/50 to 79: Normal
108/80 to 89: Stage 1 hypertension
108/90 to 93: Stage 2 hypertension

Every 108 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
108/50	Normal	58	69.3
108/51	Normal	57	70
108/52	Normal	56	70.7
108/53	Normal	55	71.3
108/54	Normal	54	72
108/55	Normal	53	72.7
108/56	Normal	52	73.3
108/57	Normal	51	74
108/58	Normal	50	74.7
108/59	Normal	49	75.3
108/60	Normal	48	76
108/61	Normal	47	76.7
108/62	Normal	46	77.3
108/63	Normal	45	78
108/64	Normal	44	78.7
108/65	Normal	43	79.3
108/66	Normal	42	80
108/67	Normal	41	80.7
108/68	Normal	40	81.3
108/69	Normal	39	82
108/70	Normal	38	82.7
108/71	Normal	37	83.3
108/72	Normal	36	84
108/73	Normal	35	84.7
108/74	Normal	34	85.3
108/75	Normal	33	86
108/76	Normal	32	86.7
108/77	Normal	31	87.3
108/78	Normal	30	88
108/79	Normal	29	88.7
108/80	Stage 1	28	89.3
108/81	Stage 1	27	90
108/82	Stage 1	26	90.7
108/83	Stage 1	25	91.3
108/84	Stage 1	24	92
108/85	Stage 1	23	92.7
108/86	Stage 1	22	93.3
108/87	Stage 1	21	94
108/88	Stage 1	20	94.7
108/89	Stage 1	19	95.3
108/90	Stage 2	18	96
108/91	Stage 2	17	96.7
108/92	Stage 2	16	97.3
108/93	Stage 2	15	98

What to do with a 108 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 108/70 high blood pressure?

108/70 is in the Normal range of the 2025 ACC/AHA chart, with a top number under 120 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 108/80 high blood pressure?

108/80 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 108/90 high blood pressure?

108/90 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 108/80?

About 89.3 mmHg. Mean arterial pressure is the bottom number plus a third of the pulse pressure: 80 + 28/3. The pulse pressure is 28.

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