How this tool works
This checker places a blood pressure reading into one of the categories used in the 2025 American College of Cardiology and American Heart Association (ACC/AHA) high blood pressure guideline. The categories are the same ones used since 2017.
You enter two numbers. The top number (systolic) is the pressure in your arteries when your heart beats. The bottom number (diastolic) is the pressure between beats. If you took a second reading about a minute after the first, you can enter it too. The tool then averages the two top numbers and the two bottom numbers and uses the averages.
Each number is checked against the table below. When the top and bottom numbers fall into different categories, the tool reports the higher category. For example, a top number in the "Elevated" range with a bottom number in the "Stage 1" range is reported as Stage 1.
| Category | Top number | Bottom number | |
|---|---|---|---|
| Normal | less than 120 | and | less than 80 |
| Elevated | 120–129 | and | less than 80 |
| Stage 1 high blood pressure | 130–139 | or | 80–89 |
| Stage 2 high blood pressure | 140 or higher | or | 90 or higher |
| Severe (crisis) | higher than 180 | and/or | higher than 120 |
If the top number is above 180 or the bottom number is above 120, the tool shows urgent guidance instead of a routine result.
A worked example
Suppose your first reading is 132/78 and your second, one minute later, is 126/82.
- Average top number: (132 + 126) ÷ 2 = 258 ÷ 2 = 129
- Average bottom number: (78 + 82) ÷ 2 = 160 ÷ 2 = 80
A top number of 129 falls in the Elevated range. A bottom number of 80 falls in the Stage 1 range. Because the higher category wins, the result is Stage 1 high blood pressure. One result like this is not a diagnosis; it is a reason to keep measuring and to share your log with your doctor.
For tips on getting an accurate reading at home, see our blood pressure chart for seniors.
Limits of this tool
A single reading can be thrown off by a cuff that is the wrong size, talking, a full bladder, caffeine or recent activity. Some people read higher in the doctor's office than at home (white-coat hypertension), and others read lower in the office than at home (masked hypertension). The 2025 guideline supports home and ambulatory monitoring to confirm readings. This tool does not estimate your heart disease risk, and it does not set a personal target for you.
When to talk to your doctor
Share your readings if they are often in the Elevated range or higher. If a reading is above 180/120, wait a few minutes and measure again. If it is still that high, contact your doctor right away. If you also have chest pain, shortness of breath, back pain, numbness or weakness, a change in vision or trouble speaking, call 911. Learn other warning signs in our guide to stroke and heart attack warning signs.
Frequently asked questions
Why does the tool use the higher category?
The guideline categories are built so that either number alone can place you in a higher group. A normal top number does not cancel out a high bottom number, so the tool reports whichever category is higher.
How should I take a reading at home?
Sit quietly for 5 minutes with your back supported, feet flat and arm resting at heart level. Use the right cuff size and avoid caffeine, exercise and smoking for 30 minutes beforehand. Take 2 readings 1 minute apart and write both down.
What blood pressure should I aim for?
The 2025 guideline says most adults should be treated to below 130/80 and encourages a top number below 120 if that can be reached without side effects. For older adults, the right goal is something to set with your own doctor.
Can I change my medicine based on this result?
No. Never start, stop or change a blood pressure medicine on your own. Bring your readings to your doctor or pharmacist and decide together.
Sources
Want the full picture? Read our guide: Blood Pressure Chart for Seniors: What Your Numbers Mean (2025 Guidelines).
Read the guideThis tool gives general information for education only. It does not diagnose any condition or replace advice from your doctor, nurse or pharmacist. In an emergency call 911. See our medical disclaimer and sources.