Mayo Clinic Health Library

Blood pressure chart: What your reading means

Updated: 03-17-2011

This blood pressure chart can help you figure out if your blood pressure is at a healthy level or if you'll need to take some steps to improve your numbers.

Blood pressure readings fall into four general categories, ranging from normal to stage 2 hypertension (high blood pressure). The level of your blood pressure determines what kind of treatment you may need. To get an accurate blood pressure measurement, your doctor should evaluate your readings based on the average of two or more blood pressure readings on each of two office visits.

Here's a look at the four blood pressure categories and what they mean for you. If your readings fall into two different categories, your correct blood pressure category is the higher category. For example, if your blood pressure reading is 125/95 millimeters of mercury (mm Hg), you have stage 1 hypertension.

Top number (systolic) in mm Hg   Bottom number (diastolic) in mm Hg Your category* What to do**
Below 120 and Below 80 Normal blood pressure Maintain or adopt a healthy lifestyle.
120-139 or 80-89 Prehypertension Maintain or adopt a healthy lifestyle.
140-159 or 90-99 Stage 1 hypertension Maintain or adopt a healthy lifestyle. If blood pressure goal isn't reached in about six months, talk to your doctor about taking one or more medications.
160 or more or 100 or more Stage 2 hypertension Maintain or adopt a healthy lifestyle. Talk to your doctor about taking more than one medication.

*Ranges may be lower for children and teenagers. Talk to your child's doctor if you're concerned your child has high blood pressure.

**Note: These recommendations address high blood pressure as a single health condition. If you also have heart disease, diabetes, chronic kidney disease or certain other conditions, you'll need to treat your blood pressure more aggressively.

If your blood pressure is normal, maintaining or adopting a healthy lifestyle can prevent or delay the onset of high blood pressure or other health problems. If your blood pressure isn't normal, a healthy lifestyle — oftentimes along with medication — can help bring it under control and reduce your risk of life-threatening complications.

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