A blood pressure of 105/63 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’s also comfortably above the threshold for low blood pressure, which starts below 90/60.
Where 105/63 Falls on the Chart
The American Heart Association’s 2025 guidelines break blood pressure into four categories:
- Normal: below 120/80
- Elevated: 120 to 129 systolic, with diastolic still under 80
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic
At 105/63, both numbers sit well inside the normal range. The top number (105) reflects the pressure in your arteries when your heart beats. The bottom number (63) reflects the pressure between beats, when your heart is resting. Both values indicate your cardiovascular system isn’t working harder than it needs to.
Is It Too Low?
Blood pressure is generally considered low (hypotension) when it drops below 90/60. Some definitions flag a diastolic reading under 60 on its own as potentially low. Your diastolic of 63 clears that line, and a systolic of 105 is well above 90, so this reading doesn’t meet any standard definition of hypotension.
That said, blood pressure numbers only tell part of the story. What matters just as much is how you feel. Low blood pressure only becomes a medical concern when it causes symptoms like dizziness or lightheadedness, blurred or fading vision, fatigue, trouble concentrating, fainting, or an upset stomach. If you’re reading 105/63 and feeling perfectly fine, there’s nothing to worry about.
Who Typically Runs Lower
Some people naturally have blood pressure on the lower end of normal, and 105/63 is a common resting level for a few groups. Physically active people tend to run lower. Research comparing competitive athletes to the general population found that athletes had systolic readings roughly 8% lower and diastolic readings about 4% lower on average. Their rate of hypertension was also about half that of the general population.
Younger adults, particularly younger women, also tend to have naturally lower resting blood pressure. During pregnancy, blood pressure often dips in the first and second trimesters before rising again closer to delivery. A reading of 105/63 during pregnancy is well within the normal range of 120/80 or lower.
Age and Context Matter
For most adults, 105/63 is healthy at any age. In older adults, though, blood pressure that runs on the lower side deserves a bit more attention, not because 105/63 is inherently dangerous, but because older adults are more prone to sudden drops when standing up (orthostatic hypotension). If you’re over 65 and notice dizziness when you get up from a chair or bed, mention your readings to your doctor even if the numbers themselves look fine on paper.
Getting an Accurate Reading
A single blood pressure reading is a snapshot, not a full picture. Many factors can temporarily push your numbers up or down, so it helps to know whether your 105/63 reflects your true resting level.
For the most reliable reading, avoid eating, drinking caffeine or alcohol, smoking, or exercising for at least 30 minutes beforehand. Empty your bladder first. Sit in a comfortable chair with your back supported and both feet flat on the floor for at least five minutes before measuring. Rest your arm on a table at chest height with the cuff against bare skin, not over a sleeve. Keep your legs uncrossed and don’t talk during the reading.
Even small changes in positioning can affect results. Letting your arm hang at your side instead of resting it on a surface, or crossing your legs, can raise the reading. On the other end, nervousness at a doctor’s office (sometimes called white coat syndrome) can inflate readings by enough to push a normal result into the elevated range. As many as one in three people who get a high reading at the clinic have normal blood pressure at home. Taking measurements at home over several days gives you a much more reliable baseline than any single check.
If your home readings consistently land around 105/63, you’re looking at a healthy, well-functioning cardiovascular system with no cause for concern.