A good blood pressure reading is below 120/80 mm Hg. That’s the threshold confirmed by the latest 2025 guidelines from the American Heart Association and American College of Cardiology, and it applies to all adults regardless of age. Anything at or above 130/80 is now classified as high blood pressure.
What the Two Numbers Mean
Blood pressure is written as two numbers, like 118/76. The top number (systolic) measures the force of blood pushing against your artery walls each time your heart beats. The bottom number (diastolic) measures the pressure between beats, when your heart is refilling with blood. Both numbers matter, and if they fall into different categories, the higher category is the one that counts.
The Five Blood Pressure 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
- Hypertensive crisis: Higher than 180 systolic OR higher than 120 diastolic
Notice the shift from “and” to “or” at Stage 1. For a normal reading, both numbers need to be in range. But for a hypertension diagnosis, only one number needs to be elevated. So a reading of 118/92 would still qualify as Stage 1 hypertension because the bottom number is too high, even though the top number looks fine.
Why the Threshold Dropped to 130/80
Before 2017, high blood pressure started at 140/90 for most adults and 150/80 for people over 65. The guidelines changed after a major clinical trial (SPRINT) showed that treating blood pressure more aggressively, aiming for lower targets, significantly reduced heart attacks, strokes, and cardiovascular death. The 2025 guidelines kept these same categories and set an overarching treatment goal of below 130/80 for all adults.
One important change: the guidelines no longer give older adults a higher threshold. Whether you’re 35 or 75, the categories are the same. The evidence didn’t support treating age groups differently.
When Blood Pressure Is Too Low
A reading below 90/60 is generally considered low blood pressure, or hypotension. But low numbers are only a concern if they cause symptoms like dizziness, fainting, or blurred vision. Some people naturally run on the lower end and feel perfectly fine. What matters more than a single low reading is a sudden drop. A decrease of just 20 mm Hg in systolic pressure, say from 110 down to 90, can make you lightheaded or cause you to faint. Large, rapid drops can be life-threatening.
When a Reading Is an Emergency
A reading of 180/120 or higher is a hypertensive crisis. If you see numbers that high and have symptoms like chest pain, shortness of breath, severe headache, blurred vision, confusion, or numbness on one side of your body, call 911. Those symptoms suggest the extreme pressure is actively damaging organs. Even without symptoms, a reading at that level needs prompt medical attention.
Blood Pressure During Pregnancy
Pregnancy has its own set of standards. Gestational hypertension is diagnosed when blood pressure reaches 140/90 or higher after 20 weeks of pregnancy in someone who previously had normal readings. This is distinct from preeclampsia, a more serious condition that involves high blood pressure along with signs of organ damage. If you have risk factors for preeclampsia, your provider may recommend low-dose aspirin as a preventive measure.
Getting an Accurate Reading
A single reading doesn’t tell you much. Blood pressure fluctuates throughout the day based on stress, caffeine, activity, and even the time of day. The clinical definition of hypertension is based on your average across multiple readings, not one visit. If your numbers are borderline, tracking at home over a week or two gives a much clearer picture than a single measurement at a doctor’s office, where anxiety alone can push readings higher.
For the most accurate home reading, sit quietly for five minutes with your feet flat on the floor and your arm supported at heart level. Take two readings a minute apart and average them. Do this at the same time each day, ideally morning and evening.
Lifestyle Changes That Lower Your Numbers
If your blood pressure is in the elevated or Stage 1 range, lifestyle changes alone can sometimes bring it back to normal. The numbers are encouraging. The DASH diet, which emphasizes fruits, vegetables, whole grains, and low-fat dairy while cutting saturated fat, can lower systolic blood pressure by up to 11 mm Hg. Reducing sodium intake to 1,500 mg per day or less can drop it another 5 to 6 mm Hg. Weight loss helps too: each kilogram lost (about 2.2 pounds) lowers blood pressure by roughly 1 mm Hg.
These effects stack. Someone with a reading of 138/86 who loses 10 pounds, cleans up their diet, and cuts back on salt could realistically move back into the normal range. The 2025 guidelines recommend a 3 to 6 month trial of lifestyle changes before starting medication for people whose blood pressure is between 130/80 and 139/89 and who don’t have diabetes, kidney disease, or existing heart disease.
For people who already have those conditions, or whose 10-year cardiovascular risk is 7.5% or higher, medication is recommended alongside lifestyle changes once blood pressure consistently hits 130/80. At 140/90 or above, medication is recommended for all adults.
Targets for Chronic Conditions
If you have chronic kidney disease, guidelines from the international kidney disease organization KDIGO recommend an even lower systolic target: below 120 mm Hg. This more aggressive goal is based on evidence that tighter blood pressure control slows kidney damage and reduces cardiovascular events. For people with both kidney disease and diabetes, the ideal target is less clear-cut, and your provider will likely tailor the goal based on how your kidneys are functioning and how well you tolerate lower pressures.