Normal blood pressure is below 120/80 mm Hg. Anything above that falls into one of four categories, from slightly elevated to dangerously high, based on guidelines updated in 2025 by the American Heart Association and American College of Cardiology. Understanding where your numbers land helps you gauge your cardiovascular risk and know when to take action.
What the Two Numbers Mean
A blood pressure reading has two numbers written as one over the other, like 118/76. The top number (systolic) measures the pressure in your arteries when your heart beats and pushes blood out. The bottom number (diastolic) measures the pressure between beats, when your heart is relaxed and refilling. Both numbers matter, and if they fall into different categories, the higher category is the one that applies to you.
The Five Blood Pressure Categories
The current guidelines define four main categories for adults, plus a crisis threshold:
- 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
- Hypertensive Crisis: 180/120 or higher
Notice that the word changes from “and” to “or” once you cross into Stage 1. That means if only one of your numbers is elevated, you still qualify for that stage. A reading of 135/75, for example, counts as Stage 1 hypertension even though the bottom number looks fine.
What Each Category Means for You
A normal reading means your heart and blood vessels are working efficiently. No treatment is needed, but it’s worth checking periodically since blood pressure tends to creep up with age.
Elevated blood pressure is a warning zone. You haven’t crossed into hypertension yet, but you’re likely to without lifestyle changes. Reducing sodium, increasing physical activity, and managing stress can often bring these numbers back down.
Stage 1 hypertension is where cardiovascular risk starts climbing meaningfully. For people at higher risk of heart disease or stroke (based on factors like age, cholesterol, diabetes, or smoking), medication may be recommended alongside lifestyle changes. For lower-risk individuals, lifestyle modifications alone are typically the first step.
Stage 2 hypertension usually calls for medication in addition to lifestyle changes. At this level, the sustained pressure on your artery walls accelerates damage to the heart, kidneys, brain, and eyes over time.
A hypertensive crisis, at 180/120 or above, requires immediate attention. If you see a reading that high along with symptoms like chest pain, severe headache, vision changes, or shortness of breath, call 911. This can signal organ damage that needs emergency treatment.
Low Blood Pressure Also Has a Threshold
While most people worry about readings that are too high, blood pressure can also be too low. A reading below 90/60 mm Hg is generally considered hypotension. Some people run naturally low without any symptoms, and that’s not a problem. It becomes a concern when it causes dizziness, fainting, blurred vision, or fatigue, which can signal dehydration, blood loss, a heart condition, or a medication side effect.
Isolated Systolic Hypertension
It’s common, especially as people get older, for the top number to be high while the bottom stays normal. This is called isolated systolic hypertension: a systolic reading of 130 or higher with a diastolic below 80. It happens because arteries stiffen with age, losing their ability to flex when the heart pumps. Despite the normal-looking bottom number, this pattern raises the risk of stroke, heart disease, dementia, and chronic kidney disease over time. Conditions like an overactive thyroid, diabetes, heart valve disease, and obesity can also contribute.
Blood Pressure Targets for Older Adults
The 2025 guidelines recognize that blood pressure management isn’t one-size-fits-all as people age. For adults 65 to 79, the primary treatment goal is below 140/80, with a lower target of 120 to 129 systolic considered if the person tolerates it well. For those 80 and older, guidelines suggest keeping systolic pressure between 140 and 150, possibly aiming for 130 to 139 if tolerable. Adults 85 and older, or those who are frail, get individualized and generally more lenient targets because aggressive lowering can cause dizziness and falls.
For younger adults at increased cardiovascular risk (estimated at 7.5% or higher using standardized risk calculators), the recommended target is below 130/80, with encouragement to push systolic below 120 when possible.
Children Use a Different Scale
Blood pressure ranges for children and teens aren’t defined by fixed cutoffs the way adult ranges are. Instead, a child’s reading is compared to other children of the same age, sex, and height using percentile charts from the National Heart, Lung, and Blood Institute. A reading at or above the 95th percentile is considered high for that child. This approach accounts for the fact that a normal blood pressure for a 6-year-old would be very different from normal for a 16-year-old.
How to Get an Accurate Reading
Your numbers can swing significantly depending on how you measure. A rushed reading taken after coffee with your legs crossed could easily add 10 to 15 points to your result. The CDC recommends a specific routine for reliability: avoid food and drinks for 30 minutes beforehand, empty your bladder, then sit in a comfortable chair with your back supported for at least 5 minutes before measuring. Both feet should be flat on the floor with legs uncrossed. Rest the arm wearing the cuff on a table at chest height, and place the cuff on bare skin rather than over clothing. Don’t talk during the reading.
A single reading isn’t enough to determine your category. Blood pressure fluctuates throughout the day based on stress, activity, hydration, and even the temperature of the room. Doctors typically look at an average of multiple readings taken on separate occasions before making a diagnosis or adjusting treatment. If you’re monitoring at home, taking two readings one minute apart in the morning and evening for several days gives a much clearer picture than any single measurement.