Blood Pressure Category Checker
Classify a blood pressure reading as normal, elevated or hypertension stage 1 or 2, using the 2025 AHA/ACC guideline.
About the Blood Pressure Category Checker
Blood pressure is written systolic/diastolic in millimetres of mercury. The category is set by whichever number is higher-risk: 128/82 is stage 1 because the diastolic is 80 or more.
Diagnosis needs several readings on different days. Measure seated after 5 minutes' rest, back supported, arm at heart level, without caffeine or exercise in the previous 30 minutes.
The formula
Category by the higher-risk number
AHA/ACC blood pressure categories
| Category | Systolic | Diastolic | |
|---|---|---|---|
| Normal | under 120 | and | under 80 |
| Elevated | 120–129 | and | under 80 |
| Stage 1 hypertension | 130–139 | or | 80–89 |
| Stage 2 hypertension | 140 or higher | or | 90 or higher |
| Severe (seek care) | over 180 | and/or | over 120 |
Worked example
Example: 140/90 mmHg = Stage 2 hypertension
- Inputs: Systolic (top number): 140 mmHg; Diastolic (bottom number): 90 mmHg.
- Formula: Category by the higher-risk number
- Result: 140/90 mmHg = Stage 2 hypertension
- Mean arterial pressure: 107 mmHg
- Pulse pressure: 50 mmHg
Things to keep in mind
- This is an estimate for general information, not medical advice. Talk to a doctor or other qualified professional about your health.
- Other countries' guidelines (for example NICE and ESC/ESH) use 140/90 as the main threshold for hypertension.
Questions people ask
Which number matters more?
Both. Over 50, systolic pressure is the stronger predictor of heart disease and stroke.
Is low blood pressure a problem?
Below about 90/60 can cause dizziness or fainting; see a doctor if you have symptoms.