A blood pressure of 115/68 is a good reading. It falls squarely in the normal category by American Heart Association standards, which define normal blood pressure as below 120/80 mmHg. In fact, research suggests that 115/75 is the point associated with the lowest risk of cardiovascular death, making your reading close to what many experts consider optimal.
Where 115/68 Falls on the Scale
The American Heart Association uses five blood pressure categories, and 115/68 sits comfortably in the best one. Normal blood pressure is any reading with a systolic (top number) below 120 and a diastolic (bottom number) below 80. Elevated blood pressure starts at 120-129 systolic, and Stage 1 hypertension begins at 130/80.
The 2024 European Society of Cardiology guidelines define “non-elevated” blood pressure as below 120/70, which also captures your reading. The European guidelines deliberately avoid calling any number “optimal” because cardiovascular risk exists on a spectrum, rising gradually even from very low readings. But for practical purposes, 115/68 puts you in the lowest-risk zone by every major guideline system.
What Each Number Tells You
The top number (115) reflects the pressure in your arteries when your heart beats. Cardiovascular risk begins rising at 115/75 and doubles with every increase of 20 points in systolic or 10 points in diastolic pressure. So a person with a systolic reading of 135 faces roughly double the vascular risk compared to someone at 115. Being at or near this baseline is a meaningful advantage.
The bottom number (68) reflects arterial pressure between heartbeats, when your heart is resting. A large study of older women published in the American Journal of Hypertension found that diastolic readings between 68 and 77 mmHg were associated with the lowest mortality risk, with the sweet spot around 72. Readings below 60 or above 90 were both linked to higher death rates, creating a U-shaped risk curve. At 68, your diastolic pressure sits right at the low end of that favorable range.
The gap between your two numbers, called pulse pressure, is 47 mmHg (115 minus 68). A healthy pulse pressure is around 40 mmHg or slightly above, so yours is in a normal range and suggests your arteries are reasonably elastic.
How This Compares to Treatment Targets
Your blood pressure naturally sits where many people with hypertension are trying to get through medication and lifestyle changes. The landmark SPRINT trial, which enrolled over 9,300 adults aged 50 and older, found that treating high blood pressure to a target below 120 mmHg systolic (rather than the traditional 140) reduced heart attacks, heart failure, and strokes by 25% and lowered overall death risk by 27%. Your systolic reading of 115 is already below that intensive treatment target without any intervention.
The trial also found that aggressive blood pressure lowering came with trade-offs, including more episodes of fainting and acute kidney problems. Reaching these numbers naturally, as your reading suggests, avoids those downsides entirely.
When Low Becomes Too Low
At 115/68, you’re nowhere near low blood pressure territory. Hypotension is generally defined as a reading below 90/60 mmHg, and most clinicians only consider it a problem when it causes symptoms like dizziness, fainting, blurred vision, fatigue, or trouble concentrating.
Context matters more than any single number. A sudden drop of just 20 points in systolic pressure can cause lightheadedness. So if your blood pressure is normally around 115 and it drops to 95 after standing up quickly or during a hot shower, you might feel it. But 115/68 as a resting reading is well above the hypotension threshold and not a cause for concern.
Making Sure Your Reading Is Accurate
A single blood pressure reading is just a snapshot. If you measured this at home or at a pharmacy kiosk, it’s worth knowing whether the conditions were right. The CDC recommends these steps for an accurate measurement:
- Timing: Avoid eating, drinking, or exercising for 30 minutes beforehand, and empty your bladder first.
- Position: Sit with your back supported and both feet flat on the floor for at least five minutes before measuring. Keep your legs uncrossed.
- Arm placement: Rest your arm on a table at chest height with the cuff against bare skin.
- Cuff fit: The cuff should be snug but not tight. A cuff that’s too small or too large can skew results.
- Silence: Don’t talk during the reading.
If you followed these steps and got 115/68, you can feel confident in the number. For even more reliability, take two readings one minute apart and average them. Blood pressure naturally fluctuates throughout the day, so tracking it over several days gives a clearer picture than any single measurement.