A blood pressure of 103/70 is a good reading. It falls squarely within the normal category, which is defined as a systolic (top number) below 120 and a diastolic (bottom number) below 80. It is also well above the threshold for low blood pressure, which starts at 90/60 or below.
Where 103/70 Falls on the Scale
The 2025 guidelines from the American Heart Association and American College of Cardiology break adult blood pressure into four categories:
- Normal: below 120/80
- Elevated: 120 to 129 systolic with diastolic still below 80
- Hypertension Stage 1: 130 to 139 systolic or 80 to 89 diastolic
- Hypertension Stage 2: 140 or higher systolic or 90 or higher diastolic
At 103/70, both your numbers sit comfortably in the normal range. You’re 17 points below the elevated threshold on the top number and 10 points below on the bottom number. These categories apply to all adults, including older adults and pregnant women, so 103/70 is considered healthy regardless of age or life stage.
Why Lower Is Generally Better
Blood pressure in the low-normal range is associated with a lower risk of heart attack, stroke, and heart failure. The landmark SPRINT trial, which enrolled over 9,000 adults, found that people who kept their systolic pressure below 120 had a 25% lower rate of major cardiovascular events compared to those who targeted a more relaxed goal. A reading of 103/70 is the kind of number that intensive treatment groups in clinical trials are trying to achieve.
That doesn’t mean you need to do anything special to maintain it. For people who already have normal blood pressure, the standard recommendation is simply to keep living a healthy lifestyle: regular physical activity, a balanced diet, limited sodium, and moderate alcohol intake. These habits help prevent blood pressure from creeping upward over time.
When a Low-Normal Reading Could Be a Concern
A reading of 103/70 is not low blood pressure. Clinically, low blood pressure (hypotension) is defined as 90/60 or below. Your reading is 13 points above that systolic cutoff and 10 points above the diastolic one.
That said, what matters just as much as the number itself is how you feel. Some people naturally run on the lower end and feel perfectly fine. Others may notice symptoms even when their reading is technically in the normal range, particularly if their blood pressure has recently dropped from a higher baseline. Symptoms of blood pressure that’s too low for your body include:
- Dizziness or lightheadedness, especially when standing up
- Fainting or feeling close to fainting
- Blurred vision
- Fatigue, sluggishness, or unusual weakness
- Nausea
- Difficulty concentrating or confusion
If you’re experiencing none of these, 103/70 is working well for your body. If you do notice any of them regularly, it’s worth bringing up at your next appointment, since the cause could be dehydration, medication side effects, or other factors that are straightforward to address.
Making Sure Your Reading Is Accurate
A single blood pressure reading is a snapshot, and small errors in technique can shift the numbers by 10 points or more. To get a reliable measurement, whether at home or in a clinic, follow these steps:
- Avoid food, drinks, and caffeine for 30 minutes beforehand.
- Empty your bladder before the reading.
- Sit with your back supported for at least 5 minutes before measuring.
- Keep both feet flat on the floor with legs uncrossed.
- Rest the cuffed arm on a table at chest height (letting your arm hang at your side can artificially raise the reading).
- Place the cuff on bare skin, not over clothing.
- Stay still and don’t talk during the measurement.
If you’re checking at home, take two or three readings about a minute apart and average them. Blood pressure fluctuates throughout the day, so a pattern of readings over several days gives you a much more accurate picture than any single number. If your readings consistently land near 103/70, you can feel confident that your blood pressure is in a healthy place.