A normal blood pressure reading is below 120/80 mm Hg. That target hasn’t changed in the latest 2025 guidelines from the American Heart Association and American College of Cardiology, and it applies to most adults regardless of age. Once your top number (systolic) hits 130 or your bottom number (diastolic) reaches 80, you’re in the range of high blood pressure.
The Four Blood Pressure Categories
Blood pressure is measured in millimeters of mercury (mm Hg) and written as two numbers. The top number, systolic pressure, measures the force when your heart beats. The bottom number, diastolic pressure, measures the force between beats. Both numbers matter, and either one being too high is enough to bump you into a higher category.
- Normal: Below 120 systolic and below 80 diastolic
- Elevated: 120 to 129 systolic with diastolic still below 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
Elevated blood pressure is a warning zone. It means your heart is working harder than it should, but you haven’t crossed into hypertension yet. At this stage, lifestyle changes like cutting sodium, exercising more, and managing stress can often bring numbers back down. Once you’re in Stage 1 or Stage 2, the conversation with your doctor shifts toward whether medication is needed alongside those changes.
What About Adults Over 65?
The target for older adults is the same: below 120 systolic. A major NIH-funded trial called SPRINT found that lowering systolic pressure to below 120 in adults age 50 and older significantly reduced the risk of cardiovascular disease and death. Before that study, many clinicians aimed for a more relaxed target in seniors, but the evidence shifted practice toward tighter control.
That said, some older adults are more sensitive to drops in blood pressure, which can cause dizziness or falls. Doctors weigh the benefits of a lower target against these risks on a case-by-case basis, particularly for people over 80 or those on multiple medications.
Targets for Kidney Disease and Other Conditions
If you have chronic kidney disease, the recommended target is a systolic reading below 120, the same as the general population. Guidelines from the international kidney disease organization KDIGO support this goal for most people between ages 50 and 80 who can tolerate it. For kidney transplant recipients, the target is slightly more conservative: below 130/80.
For people with diabetes, the general goal also trends toward keeping systolic pressure under 120, though clinicians may adjust this depending on other health factors. The key takeaway is that having a chronic condition doesn’t mean you get a pass on higher numbers. If anything, tight blood pressure control becomes more important because the cardiovascular risks are already elevated.
When Blood Pressure Is Too Low
A reading below 90/60 is generally considered low blood pressure, or hypotension. But here’s the thing: low blood pressure only becomes a problem when it causes symptoms. Some people walk around at 95/60 their whole lives and feel perfectly fine.
The symptoms to watch for include dizziness, blurred vision, fatigue, trouble concentrating, and fainting. A sudden drop is more dangerous than a consistently low reading. Losing just 20 points on your systolic number, say from 110 to 90, can be enough to make you lightheaded or pass out. Extreme drops can lead to shock, which shows up as confusion, cold and clammy skin, rapid shallow breathing, and a weak pulse. That’s a medical emergency.
Pulse Pressure: The Gap Between Your Numbers
There’s a lesser-known number hiding in your reading: pulse pressure. It’s simply the top number minus the bottom number. If your blood pressure is 120/80, your pulse pressure is 40, which is considered healthy. A pulse pressure consistently above 40 is a sign that your arteries may be stiffening, and a gap greater than 60 is a recognized risk factor for heart disease, especially in older adults. If your reading is something like 150/70, that gap of 80 is worth discussing with your doctor even if the individual numbers don’t seem alarming on their own.
When a Reading Becomes an Emergency
A blood pressure of 180/120 or higher is classified as a hypertensive crisis. There are two levels. If your reading hits that threshold but you have no symptoms, it’s considered urgent. Relax for a few minutes and recheck. If it stays that high, seek medical care.
If you hit 180/120 and you’re also experiencing chest pain, shortness of breath, or stroke symptoms like sudden numbness, slurred speech, or vision changes, that’s an emergency. Call 911 immediately. At these pressures, organs can be actively sustaining damage.
Getting an Accurate Reading at Home
Your blood pressure can swing by 10 to 20 points depending on how you measure it. Small mistakes in technique are one of the biggest reasons people get readings that don’t reflect their actual cardiovascular health. Here’s what produces the most reliable number:
Sit in a chair with your back supported and both feet flat on the floor. Rest quietly for at least five minutes before taking a reading. No talking, no scrolling your phone, no moving around. Place the cuff on your bare upper arm, not over a sleeve (rolling up a tight sleeve can act like a tourniquet and inflate the reading). The bottom edge of the cuff should sit about two to three centimeters above your elbow crease, and the cuff should be snug enough that one finger slides easily underneath but two fingers feel tight.
Your arm needs to be supported on a flat surface like a table, with the cuff at the level of your heart. Holding your arm up or letting it dangle at your side can shift the reading in either direction. Use the correct cuff size for your arm. A cuff that’s too small will give a falsely high reading, which is one of the most common sources of error. The inflatable part of the cuff, called the bladder, should wrap around 75 to 100 percent of your upper arm.
Take two or three readings a minute apart and average them. A single measurement is a snapshot; the average gives you the real picture.