Blood Pressure Checker
Enter your systolic and diastolic readings to find out what your blood pressure means and whether you should see a doctor.
Your Blood Pressure Reading
NHS Blood Pressure Categories
| Category | Systolic (mmHg) | Diastolic (mmHg) | What to do |
|---|---|---|---|
| Low (Hypotension) | < 90 | < 60 | See GP if you have symptoms (dizziness, fainting) |
| Ideal / Normal | 90 – 119 | 60 – 79 | Maintain healthy lifestyle |
| Elevated | 120 – 129 | 60 – 79 | Lifestyle changes recommended |
| High – Stage 1 | 130 – 139 | 80 – 89 | Consult your GP; lifestyle changes |
| High – Stage 2 | ≥ 140 | ≥ 90 | See your GP promptly |
| Hypertensive Crisis | ≥ 180 | ≥ 120 | Seek emergency care immediately |
Medical Disclaimer: This tool is for general information only and does not constitute medical advice. Blood pressure readings can vary throughout the day. If you are concerned about your blood pressure, please consult a qualified healthcare professional or your GP. In an emergency, call 999.
Tips to Lower BP
- Exercise regularly (150 min/week moderate)
- Reduce salt intake (<6 g/day)
- Maintain a healthy weight
- Stop smoking
- Limit alcohol (14 units/week max)
- Eat more fruit and vegetables
- Get 7–9 hours of sleep
- Manage stress (mindfulness, relaxation)
How to Measure Accurately
- Sit quietly for 5 minutes before measuring
- Back supported; feet flat on floor
- Cuff on bare upper arm at heart level
- Do not talk or move during measurement
- No caffeine, exercise, or smoking for 30 min before
- Take 2 readings 1 minute apart — record the average
Related Tools
UK Helplines
British Heart Foundation:
0300 330 3311 (Mon–Fri 9am–5pm)
NHS 111:
111 (24/7 non-emergency)
Emergency:
999 (life-threatening)
Frequently Asked Questions
A normal (ideal) blood pressure is between 90/60 mmHg and 120/80 mmHg. The first number (systolic) measures pressure when your heart beats; the second (diastolic) measures pressure between beats. NHS guidelines classify 120/80 mmHg as ideal.
High blood pressure (hypertension) is a reading of 140/90 mmHg or above. Stage 1 hypertension is 130–139 / 80–89 mmHg; Stage 2 is 140+ / 90+ mmHg. Hypertensive crisis (seek emergency care) is 180+ / 120+ mmHg.
High blood pressure can be caused by lifestyle factors (excess salt, alcohol, smoking, lack of exercise, obesity) or by underlying conditions (kidney disease, thyroid problems). In most cases (primary hypertension) the exact cause is unknown. Age, family history, and ethnicity are risk factors.
Low blood pressure is generally a reading below 90/60 mmHg. It may cause dizziness, fainting, or fatigue. Dehydration, some medications, heart conditions, and prolonged bed rest are common causes. See your GP if low BP causes symptoms.
Sit quietly for 5 minutes before measuring. Keep your back supported and feet flat on the floor. Place the cuff on your bare upper arm at heart level. Do not talk during the measurement. Avoid caffeine, exercise, or smoking 30 minutes before. Take two readings a minute apart and record the average.