Enter your systolic and diastolic readings to get your hypertension category, cardiovascular risk level, pulse pressure, and mean arterial pressure — plus personalised AI advice.
Understanding your numbers — reference tables, lifestyle factors, and when to seek help.
| Category | Systolic | Diastolic | Risk | Action |
|---|---|---|---|---|
| Normal ✓ | Below 120 | Below 80 | Low | Maintain healthy lifestyle |
| Elevated | 120–129 | Below 80 | Slightly increased | Lifestyle changes advised |
| High — Stage 1 | 130–139 | 80–89 | Moderate | Consult your GP |
| High — Stage 2 | 140–179 | 90–119 | High | Medical treatment needed |
| Hypertensive Crisis | 180+ | 120+ | Very High | Call 999 immediately |
| Low (Hypotension) | Below 90 | Below 60 | Moderate | Speak with your GP |
| Change | Effect | Estimated Reduction | Evidence |
|---|---|---|---|
| Reduce salt to <6g/day | Lowers BP | −2 to −8 mmHg | Strong ★★★★★ |
| Regular aerobic exercise | Lowers BP | −4 to −9 mmHg | Strong ★★★★★ |
| DASH diet | Lowers BP | −8 to −14 mmHg | Strong ★★★★★ |
| Lose 10kg (if overweight) | Lowers BP | −5 to −20 mmHg | Strong ★★★★★ |
| Limit alcohol | Lowers BP | −2 to −4 mmHg | Moderate ★★★★☆ |
| Smoking | Raises BP | +3 to +10 mmHg | Strong ★★★★★ |
| Chronic stress | Raises BP | Variable | Moderate ★★★☆☆ |
This calculator uses NHS and AHA blood pressure categories to classify your reading and calculate pulse pressure (systolic minus diastolic) and mean arterial pressure (MAP = diastolic + pulse pressure ÷ 3). A single reading can be affected by stress, caffeine, or recent activity. Multiple readings over several days give a more accurate picture. Always consult your GP for a proper assessment.