A blood pressure of 100/68 is a good reading. It falls well within the normal category, which the American Heart Association defines as below 120/80 mmHg. It’s also comfortably above the threshold for low blood pressure, which starts at 90/60. For most adults, 100/68 is a healthy number that reflects a cardiovascular system working efficiently.
Where 100/68 Falls on the Blood Pressure Chart
The 2025 AHA guidelines break adult blood pressure into four categories:
- Normal: below 120 systolic and below 80 diastolic
- Elevated: 120 to 129 systolic and below 80 diastolic
- Stage 1 hypertension: 130 to 139 systolic or 80 to 89 diastolic
- Stage 2 hypertension: 140 or higher systolic, or 90 or higher diastolic
Your top number (100) measures pressure when the heart pumps. Your bottom number (68) measures pressure between beats, when the heart is resting. Both numbers sit solidly in the normal range, and neither is close to the boundaries for elevated blood pressure or for clinical low blood pressure.
Why Some People Naturally Run Lower
If 100/68 feels surprisingly low, it helps to know that many healthy adults sit in this range every day without any problems. People who exercise regularly tend to have lower resting blood pressure because a stronger heart pumps more blood with less effort, reducing the force on blood vessel walls. This is one reason athletes often see readings around 100/60.
Genetics, body size, and age also play a role. Younger adults and women are more likely to have naturally lower readings. As long as you feel fine, a reading in this range is typically a sign of good cardiovascular health, not a concern.
When a Low-Normal Reading Could Be a Problem
Blood pressure is considered too low only when it causes symptoms. The clinical cutoff for hypotension is 90/60, and 100/68 is above that. But numbers alone don’t tell the whole story. What matters more is how you feel and whether your reading has changed. A sudden drop of even 20 mmHg from your usual baseline can cause dizziness or fainting, even if the number itself looks “normal” on a chart.
Symptoms to watch for include:
- Dizziness or lightheadedness, especially when standing up
- Blurred or fading vision
- Fatigue or trouble concentrating
- Fainting
- Nausea
If you’re experiencing any of these regularly, your blood pressure may be too low for your body, even at 100/68. Some people simply need a higher baseline to feel well. This is worth bringing up with a healthcare provider, especially if the symptoms are new.
Making Sure Your Reading Is Accurate
A single blood pressure reading is a snapshot, not a verdict. Several common factors can throw off the number you see. A cuff that’s the wrong size is one of the biggest culprits. The inflatable portion should cover about 75% to 100% of the distance around your upper arm. A cuff that’s too large can give a falsely low reading, while one that’s too small can read high.
If you’re checking at home, take two readings each time with a one-minute pause in between. Sit with your back supported, feet flat on the floor, and your arm resting at heart level. Avoid caffeine, exercise, and a full bladder for at least 30 minutes beforehand. Consistent technique matters more than any single number. If you see 100/68 across multiple readings taken correctly, you can be confident the result reflects your actual blood pressure.
What 100/68 Means Long Term
From a long-term health perspective, lower blood pressure within the normal range is associated with reduced strain on the heart and blood vessels. The real cardiovascular risks begin when blood pressure climbs above 120/80 and increase significantly at stage 1 hypertension (130/80) and beyond. Sitting at 100/68 means your arteries are under relatively little stress between and during heartbeats, which is protective over decades.
The bottom line: if you feel well, 100/68 is not just acceptable, it’s a reading most people would be glad to have.