Check your blood pressure readings against NHS guidelines. Get instant results and health recommendations tailored for UK residents.
Enter your blood pressure readings to get an instant interpretation based on current NHS guidelines.
Official blood pressure categories according to NHS guidelines
| Category | Systolic (mmHg) | Diastolic (mmHg) | Action Required |
|---|---|---|---|
| Low | < 90 | < 60 | Consult GP if symptomatic |
| Normal | 90-119 | 60-79 | Maintain healthy lifestyle |
| Elevated | 120-129 | < 80 | Lifestyle changes recommended |
| Stage 1 Hypertension | 130-139 | 80-89 | GP consultation recommended |
| Stage 2 Hypertension | 140-179 | 90-119 | Medical treatment likely needed |
| Hypertensive Crisis | > 180 | > 120 | Seek immediate medical attention |
Blood pressure is the force of blood pushing against the walls of your arteries as your heart pumps blood around your body. It's measured in millimetres of mercury (mmHg) and recorded as two numbers.
According to NHS guidelines, a normal blood pressure reading is below 120/80 mmHg for most adults, regardless of age. However, blood pressure naturally tends to increase with age. Your GP can provide personalised advice based on your individual health profile.
Natural ways to help lower blood pressure include: regular exercise, maintaining a healthy weight, reducing salt intake, eating more fruits and vegetables, limiting alcohol, not smoking, managing stress, and getting adequate sleep. Always consult your GP before making significant lifestyle changes.
See your GP if you consistently get readings above 140/90 mmHg, if you have symptoms like severe headaches, chest pain, or shortness of breath, or if you have risk factors for high blood pressure. Regular check-ups are recommended for adults over 40.
Home monitors can be very accurate if they're validated by the British Hypertension Society and used correctly. Look for monitors with the CE mark and follow the manufacturer's instructions. Your GP surgery can check your monitor's accuracy.
Low blood pressure can be caused by dehydration, certain medications, heart problems, endocrine disorders, severe infection, or blood loss. While often not serious, see your GP if you experience dizziness, fainting, or other symptoms.
BP Calculator is a free, evidence-based tool designed specifically for UK residents to understand and monitor their blood pressure readings according to NHS guidelines.
To provide accessible, accurate blood pressure information that helps UK residents make informed decisions about their cardiovascular health in partnership with their healthcare providers.
All information is based on current NHS, NICE, and British Hypertension Society guidelines. Our content is regularly reviewed and updated to reflect the latest medical evidence.
This calculator is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your GP or other qualified health provider with any questions you may have regarding a medical condition.
Last reviewed: January 2025