Good blood pressure for adults is below 120/80 mmHg. This threshold, reaffirmed in the 2025 joint guideline from the American Heart Association and American College of Cardiology, is the standard used to define “normal” blood pressure. Once your top number hits 120 or your bottom number reaches 80, you’ve moved into a higher risk category.
What the Two Numbers Mean
Blood pressure is written as two numbers, like 115/75. The top number (systolic) measures the force in your arteries when your heart beats. The bottom number (diastolic) measures the pressure between beats, when your heart is resting. Both numbers matter. A large study of young adults published in Circulation found that having just one number elevated, whether systolic or diastolic, increased cardiovascular risk by about 32 to 36% compared to people with normal readings. When both numbers were elevated together, risk jumped by 67%.
Blood Pressure Categories for Adults
- 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
- Severe hypertension: above 180 systolic or above 120 diastolic
Notice that elevated blood pressure only involves the top number creeping up. This is often the first warning sign, and it’s the stage where lifestyle changes can prevent progression to full hypertension. Stage 2 hypertension roughly doubles your cardiovascular risk compared to normal blood pressure.
Can Blood Pressure Be Too Low?
A reading below 90/60 mmHg is generally considered low blood pressure. But most doctors only treat it if you’re experiencing symptoms like dizziness, fainting, or lightheadedness. Your body can be sensitive to sudden changes: a drop of just 20 points in your systolic number (say, from 110 to 90) can be enough to make you feel faint, even if 90 isn’t dangerously low on its own. So “good” blood pressure sits in a range, not at the lowest possible number.
Blood Pressure in Children
The under-120/80 rule applies to adults. Children and teenagers have different standards based on their age, sex, and height. A healthy one-year-old boy, for instance, typically has blood pressure around 80/34, while a one-year-old girl averages about 86/40. These numbers climb gradually through childhood and adolescence. Pediatric blood pressure is measured in percentiles rather than fixed cutoffs, so your child’s doctor compares their reading against other kids of the same age and size.
Targets for Diabetes and Kidney Disease
If you have diabetes or chronic kidney disease, your target is more aggressive than the general population’s. Current guidelines from both American and European cardiology organizations recommend keeping blood pressure below 130/80 in these cases, and some kidney-specific guidelines push even lower, targeting a systolic number under 120. A large study of Korean adults with both diabetes and chronic kidney disease confirmed that getting below 130/80 was linked to reduced cardiovascular events. The reasoning is straightforward: high blood pressure accelerates kidney damage and compounds the vascular harm that diabetes already causes.
How to Get an Accurate Reading
Blood pressure fluctuates throughout the day, and a single reading taken under the wrong conditions can be misleadingly high. The CDC recommends a specific routine for reliable results: sit in a comfortable chair with your back supported for at least five minutes before measuring. Place both feet flat on the floor with your legs uncrossed. Rest your arm on a table so the cuff sits at chest height, directly against bare skin rather than over clothing. Don’t talk during the reading.
These details matter more than most people realize. Crossing your legs can raise your systolic number by several points. A cuff placed over a sleeve or positioned too low on your arm skews results. If you’re tracking blood pressure at home, take readings at the same time each day, ideally in the morning and evening, and record the average over several days rather than reacting to any single measurement.
How Much Lifestyle Changes Can Lower Your Numbers
If your blood pressure is elevated or in the stage 1 range, lifestyle changes alone can sometimes bring you back to normal. The most effective dietary approach is the DASH diet (rich in fruits, vegetables, whole grains, and low-fat dairy while limiting saturated fat and sodium). In a meta-analysis of 24 clinical trials, the DASH diet lowered systolic pressure by about 7.6 points and diastolic by 4.2 points on average. When combined with exercise and weight loss, those reductions nearly doubled, reaching 16.1 points systolic and 9.9 points diastolic.
Cutting sodium makes a meaningful difference on its own. Reducing sodium intake by about 2,300 mg per day (roughly one teaspoon of table salt) lowered systolic pressure by 7.7 points in people who started above 131/78. The effect is even more dramatic for people with higher starting blood pressure: in one trial, people with systolic readings of 150 or above who combined the DASH diet with low sodium intake saw drops of about 10.4 points from sodium restriction alone.
Weight loss is another powerful lever. Losing 5% to 10% of your body weight typically reduces systolic pressure by more than 5 points and diastolic by about 4 points. At larger amounts of weight loss, around 22 pounds (10 kg), systolic reductions of 5 to 20 points are possible. These numbers may sound modest, but moving from 135 to 125 can shift you from stage 1 hypertension back into the elevated or normal range, which carries meaningfully lower long-term risk.