READING LOOKUP

Blood pressure 103 over 50 to 88

A top number of 103 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.

103 over what? The quick answer

103/50 to 79: Normal
103/80 to 88: Stage 1 hypertension

Every 103 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
103/50	Normal	53	67.7
103/51	Normal	52	68.3
103/52	Normal	51	69
103/53	Normal	50	69.7
103/54	Normal	49	70.3
103/55	Normal	48	71
103/56	Normal	47	71.7
103/57	Normal	46	72.3
103/58	Normal	45	73
103/59	Normal	44	73.7
103/60	Normal	43	74.3
103/61	Normal	42	75
103/62	Normal	41	75.7
103/63	Normal	40	76.3
103/64	Normal	39	77
103/65	Normal	38	77.7
103/66	Normal	37	78.3
103/67	Normal	36	79
103/68	Normal	35	79.7
103/69	Normal	34	80.3
103/70	Normal	33	81
103/71	Normal	32	81.7
103/72	Normal	31	82.3
103/73	Normal	30	83
103/74	Normal	29	83.7
103/75	Normal	28	84.3
103/76	Normal	27	85
103/77	Normal	26	85.7
103/78	Normal	25	86.3
103/79	Normal	24	87
103/80	Stage 1	23	87.7
103/81	Stage 1	22	88.3
103/82	Stage 1	21	89
103/83	Stage 1	20	89.7
103/84	Stage 1	19	90.3
103/85	Stage 1	18	91
103/86	Stage 1	17	91.7
103/87	Stage 1	16	92.3
103/88	Stage 1	15	93

What to do with a 103 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 103/70 high blood pressure?

103/70 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 103/80 high blood pressure?

103/80 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.

What is the MAP of 103/80?

About 87.7 mmHg. Mean arterial pressure is the bottom number plus a third of the pulse pressure: 80 + 23/3. The pulse pressure is 23.

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