A good blood pressure reading is below 120/80 mmHg. That’s the threshold the American Heart Association and American College of Cardiology use to define normal blood pressure in adults, based on large-scale data linking higher numbers to increased risk of heart disease and stroke. Once your numbers climb above that point, your cardiovascular risk starts rising, even if you feel perfectly fine.
What the Two Numbers Mean
Blood pressure is always expressed as two numbers. The top number (systolic) measures the force of blood pushing against your artery walls when your heart pumps. The bottom number (diastolic) measures the pressure between beats, when your heart is filling with blood. Both numbers matter, and your reading falls into whichever category is higher. So if your systolic puts you in one range and your diastolic in another, the worse category is the one that counts.
Blood Pressure Categories for Adults
The 2025 AHA/ACC 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
Elevated blood pressure isn’t yet classified as hypertension, but it’s a warning sign. Without changes, it typically progresses to stage 1 or stage 2 over time.
Why Even Slightly High Numbers Matter
You don’t need a diagnosis of hypertension for high blood pressure to affect your health. Observational data from more than one million people shows that the risk of dying from heart disease or stroke increases in a straight line starting from readings as low as 115/75. For every 20-point rise in systolic pressure or 10-point rise in diastolic pressure, the risk of death from heart disease and stroke doubles.
Readings in the 130 to 139 over 85 to 89 range carry more than twice the cardiovascular risk compared with readings below 120/80, according to long-term data from the Framingham Heart Study. That’s why the “elevated” and “stage 1” categories exist: they flag a level of risk that lifestyle changes can meaningfully reduce.
Average Readings by Age and Sex
Blood pressure tends to rise with age, so what’s statistically average and what’s medically ideal aren’t always the same thing. Here’s what population data shows for typical readings in healthy adults:
- Ages 18 to 39: around 110/68 for women, 119/70 for men
- Ages 40 to 59: around 122/74 for women, 124/77 for men
- Age 60 and older: around 139/68 for women, 133/69 for men
Notice that average readings for people over 60 land right at or above the stage 1 hypertension cutoff. That’s common but not harmless. The goal for most adults remains below 120/80 regardless of age, though your doctor may individualize your target based on other health conditions.
When Blood Pressure Is Too Low
A reading below 90/60 is considered low blood pressure (hypotension). Low blood pressure on its own isn’t necessarily a problem. Some people run on the lower side and feel completely fine. It only becomes a concern when it causes symptoms like dizziness, fainting, blurred vision, fatigue, nausea, or confusion. If you’re getting lightheaded or passing out repeatedly, that’s worth investigating, even if you’ve always been told lower is better.
When a Reading Is an Emergency
A blood pressure reading of 180/120 or higher is a hypertensive crisis. At this level, the force on your blood vessels can damage your heart, brain, kidneys, or eyes. If you see numbers this high and have symptoms like chest pain, severe headache, shortness of breath, blurred vision, confusion, or numbness on one side of your body, call 911. Even without symptoms, a reading of 180/120 warrants urgent medical evaluation.
Home Readings vs. Office Readings
Blood pressure measured at home tends to run slightly lower than readings taken in a doctor’s office. This is partly because of “white coat” anxiety and partly because the clinical environment is less relaxed. At lower, normal blood pressure levels, the difference between home and office readings is small. But at higher pressures, office readings tend to be noticeably higher than what you’d see at home. That’s why many doctors recommend home monitoring to get a more accurate picture of your day-to-day blood pressure, especially if your office readings are borderline.
How to Get an Accurate Reading at Home
A single reading can be misleading. Blood pressure fluctuates throughout the day based on stress, food, hydration, and activity. The CDC recommends a specific routine to get reliable numbers:
- Timing: measure at the same time every day
- Preparation: don’t eat or drink anything for 30 minutes beforehand
- Positioning: sit in a comfortable chair with your back supported for at least 5 minutes before measuring
- Feet: both flat on the ground, legs uncrossed
- Arm placement: rest your arm with the cuff on a table at chest height
- Repeat: take at least two readings, 1 to 2 minutes apart, and record both
Skipping any of these steps can throw off your reading by 5 to 15 points in either direction. Crossing your legs alone can bump your systolic number up. A cuff that’s too small for your arm will give an artificially high reading. If your home numbers consistently look different from what you see at the doctor’s office, bring your home monitor to an appointment so your provider can check it against their equipment.
Keeping a written log of your readings over days or weeks gives a far more useful picture than any single measurement. It also helps your doctor spot trends and decide whether treatment changes are working.