Blood Pressure Chart UK: Normal Readings & NHS Hypertension Ranges
Understand what your systolic and diastolic numbers mean with our interactive Blood Pressure Chart UK. Aligned with clinical guidance from the National Institute for Health and Care Excellence (NICE) and the NHS, this comprehensive tool interprets your readings, classifies hypertension stages, and helps you monitor your cardiovascular health safely.
Excellent Cardiovascular Range
Your reading of 118/76 mmHg is within the ideal blood pressure range for UK adults. Keep up healthy dietary habits and regular aerobic exercise to protect your heart and blood vessels.
Evaluating your long-term cardiovascular health? Calculate your 10-year stroke and heart attack probability with our NHS-aligned QRISK Calculator, or check your body mass index on the Adult BMI Calculator.
NHS & NICE Blood Pressure Categories (Master UK Chart)
In the United Kingdom, blood pressure is categorised using evidence-based guidelines published by NICE (NG136) and the British and Irish Hypertension Society (BIHS). The table below outlines the official diagnostic thresholds for adult blood pressure:
| Category / Stage | Clinic Systolic (mmHg) | Clinic Diastolic (mmHg) | Home / ABPM Average (mmHg) | Recommended Clinical Action |
|---|---|---|---|---|
| Low Blood Pressure (Hypotension) | Under 90 | and Under 60 | Under 85 / 55 | Evaluate Symptoms Review medications if dizzy or faint. |
| Ideal / Normal Blood Pressure | 90 to 119 | and 60 to 79 | 90 to 115 / 60 to 75 | Healthy Re-check every 5 years (NHS Health Check). |
| High Normal (Pre-Hypertension) | 120 to 139 | and/or 80 to 89 | 116 to 134 / 76 to 84 | Lifestyle Advice Adopt DASH diet, reduce salt, annual check. |
| Stage 1 Hypertension | 140 to 159 | and/or 90 to 99 | 135 to 149 / 85 to 94 | Confirm with ABPM Confirm with home monitoring; assess QRISK. |
| Stage 2 Hypertension | 160 to 179 | and/or 100 to 119 | 150 or higher / 95 or higher | Medication Indicated Prompt GP appointment; initiate antihypertensives. |
| Stage 3 (Severe Hypertension / Crisis) | 180 or higher | and/or 120 or higher | N/A (Immediate Review) | Urgent Clinical Review Immediate GP/A&E evaluation if symptoms present. |
Important: The "Higher Number" Rule in Clinical Diagnosis
Under NICE criteria, if your systolic and diastolic pressures fall into different categories, your overall classification is determined by the higher category. For example, a reading of 142/78 mmHg is classified as Stage 1 Hypertension (Isolated Systolic Hypertension), even though the bottom number is completely normal.
Systolic vs. Diastolic Blood Pressure: What Do the Numbers Mean?
Blood pressure is recorded as two numbers measured in millimetres of mercury (mmHg). It reflects the hydraulic force that circulating blood exerts against the elastic walls of your arteries during the cardiac cycle.
1. Systolic Pressure (Top Number)
The systolic reading measures the maximum pressure inside your arterial network when the left ventricle of your heart contracts and forces oxygenated blood through the aorta.
Peak Contraction Pressure
2. Diastolic Pressure (Bottom Number)
The diastolic reading measures the minimum residual pressure in your arteries between beats, while the heart muscle rests and re-fills with blood.
Resting Arterial Resistance
3. Pulse Pressure & MAP
Pulse Pressure is the mathematical difference ($\text{Systolic} - \text{Diastolic}$). A widened pulse pressure (>60 mmHg) often indicates age-related arterial stiffness and vascular calcification.
Arterial Elasticity Marker
Why Is High Blood Pressure Called the "Silent Killer"?
High blood pressure (hypertension) rarely causes noticeable symptoms in its early or moderate stages. Millions of adults across England, Scotland, and Wales live with untreated hypertension without realising it. Over time, persistent elevated pressure damages endothelial vessel linings, accelerating atherosclerosis, heart failure, kidney disease, vascular dementia, and strokes.
Blood Pressure Chart by Age (UK Population Trends & Targets)
As humans age, the collagen-to-elastin ratio in major arterial walls changes, leading to natural stiffening of the aorta and peripheral vessels. Consequently, average systolic blood pressure tends to increase gradually over a lifetime.
The table below demonstrates typical population median readings from the Health Survey for England (HSE) alongside official NICE clinical targets:
| Age Bracket | Average Men (mmHg) | Average Women (mmHg) | Overall Population Median | NICE Clinic Treatment Target |
|---|---|---|---|---|
| 18 – 29 Years | 120 / 74 mmHg | 114 / 71 mmHg | 117 / 72 mmHg | < 140 / 90 mmHg (Home: <135/85) |
| 30 – 39 Years | 123 / 78 mmHg | 118 / 74 mmHg | 120 / 76 mmHg | < 140 / 90 mmHg (Home: <135/85) |
| 40 – 49 Years | 126 / 82 mmHg | 123 / 78 mmHg | 124 / 80 mmHg | < 140 / 90 mmHg (Home: <135/85) |
| 50 – 59 Years | 131 / 84 mmHg | 128 / 81 mmHg | 130 / 83 mmHg | < 140 / 90 mmHg (Home: <135/85) |
| 60 – 69 Years | 136 / 82 mmHg | 134 / 80 mmHg | 135 / 81 mmHg | < 140 / 90 mmHg (Home: <135/85) |
| 70 – 79 Years | 140 / 79 mmHg | 141 / 78 mmHg | 140 / 78 mmHg | < 140 / 90 mmHg (Home: <135/85) |
| 80+ Years | 144 / 76 mmHg | 146 / 75 mmHg | 145 / 75 mmHg | < 150 / 90 mmHg (Home: <145/85) |
Why Does NICE Set a Higher Target (<150/90) for Over 80s?
In adults aged 80 and over, overtreating hypertension can cause excessive drops in blood pressure upon standing (postural or orthostatic hypotension). This dramatically increases the risk of dizziness, falls, and bone fractures. Therefore, NICE guideline NG136 establishes a relaxed clinic target of <150/90 mmHg (and home target of <145/85 mmHg) to balance stroke prevention with fall safety.
Clinic vs. Home Blood Pressure Monitoring: Why Readings Differ
If your GP takes your blood pressure in the surgery, the result is frequently higher than when you measure it quietly in your living room. In UK medicine, this is a well-documented phenomenon known as the "White-Coat Effect".
White-Coat Effect
Subconscious stress, rushing to an appointment, or medical anxiety triggers a sympathetic adrenaline surge that transiently elevates clinic readings by 10 to 25 mmHg.
Clinic Reading Overestimate
Masked Hypertension
Occurs when clinic readings appear completely normal, but average home or ambulatory daytime readings are elevated due to daily workplace stress or lifestyle factors.
Hidden Cardiovascular Risk
The Gold Standard (ABPM)
NICE mandates that an elevated clinic reading (≥140/90) should be confirmed using 24-hour Ambulatory Blood Pressure Monitoring (ABPM) or 7-day Home Blood Pressure Monitoring (HBPM) before prescribing medication.
Diagnostic Confirmation
The NHS 7-Day Home Blood Pressure Protocol (HBPM)
If your doctor or nurse requests a 7-day home diary, follow the British and Irish Hypertension Society protocol:
- Rest first: Sit quietly in a supportive chair with feet flat on the floor and back supported for 5 minutes before pressing start.
- Cuff position: Place the cuff on your bare upper arm at heart level. Ensure the bladder tube runs down the center of your inner elbow.
- Take duplicate readings: Take 2 separate readings morning and evening, spaced 1 to 2 minutes apart.
- Record for 7 days: Discard Day 1 measurements (as anxiety is highest), and calculate the average of Days 2 through 7.
How Weight, Diet, and Lifestyle Influence Blood Pressure in the UK
Blood pressure is intimately linked with body weight, metabolic regulation, and diet. Clinical trials demonstrate that adopting non-pharmacological lifestyle interventions can lower systolic blood pressure by 10 to 15 mmHg—often equivalent to a standard first-line antihypertensive medication.
1. Body Mass Index (BMI) Reduction
Every 1 kg of excess body weight lost reduces systolic blood pressure by approximately 1 mmHg. Maintaining a healthy weight on the Adult BMI Calculator lowers arterial workload and sympathetic nervous tone.
~1 mmHg drop per kg lost
2. Salt Reduction (<6g per day)
Excess sodium causes renal fluid retention and increased blood volume. Reducing salt intake from typical UK levels (~8.4g/day) to the NHS recommended limit of under 6g/day (one level teaspoon) significantly lowers vascular resistance.
Reduces Vascular Fluid Volume
3. Regular Aerobic Exercise
Aim for 150 minutes of moderate-intensity aerobic activity (brisk walking, cycling, swimming) per week. Aerobic training improves arterial compliance and nitric oxide bioavailability.
Enhances Nitric Oxide Vasodilation
Blood Pressure and Your 10-Year Cardiovascular Risk
Blood pressure is one of the most critical variables evaluated in the NHS Health Check. When combined with age, cholesterol ratios, smoking status, and postcode deprivation scores, it determines your 10-year probability of heart attack or stroke. You can evaluate your overall risk profile using our dedicated QRISK Calculator NHS Tool.
When to Seek Urgent Medical Care (Hypertensive Crisis)
While mild to moderate hypertension requires planned GP assessment, extremely elevated blood pressure can cause acute end-organ damage requiring immediate hospital treatment.
Call 999 or Attend A&E Immediately If:
Your blood pressure reads 180/120 mmHg or higher AND you experience any of the following acute symptoms:
- Crushing, heavy chest pain or tightness radiating to the arm, neck, or jaw
- Sudden severe breathlessness or difficulty breathing when lying down
- Sudden loss of vision, blurred vision, or visual disturbances
- Sudden severe "thunderclap" headache unlike any experienced before
- Facial weakness, arm weakness, slurred speech, or difficulty speaking (FAST symptoms)
- Confusion, seizures, or acute loss of consciousness
If your reading is ≥180/120 mmHg but you have NO symptoms, rest quietly for 5 minutes and repeat the measurement. If still elevated, contact NHS 111 or your GP for same-day urgent assessment.
Frequently Asked Questions About UK Blood Pressure
Clear, evidence-backed answers to the most common questions regarding blood pressure charts, NHS diagnostic categories, and home monitoring.
Under NHS and NICE guidelines, an ideal normal blood pressure reading for a healthy adult is between 90/60 mmHg and 120/80 mmHg. A reading consistently between 120/80 mmHg and 140/90 mmHg is classified as pre-hypertension (high normal), indicating that lifestyle interventions should be adopted to prevent clinical hypertension.
The top number (systolic pressure) measures the maximum arterial pressure exerted when your heart beats and pumps blood around the body. The bottom number (diastolic pressure) measures the resting pressure in your arteries between heartbeats while the heart muscle relaxes and refills with blood.
Clinic blood pressure thresholds are 140/90 mmHg for Stage 1 hypertension, whereas Home Blood Pressure Monitoring (HBPM) and Ambulatory Blood Pressure Monitoring (ABPM) thresholds are 135/85 mmHg. This 5 mmHg difference accounts for the "white-coat effect", where anxiety or stress in a clinical setting causes a transient elevation in blood pressure.
A clinic systolic reading of 180 mmHg or higher, or a diastolic reading of 120 mmHg or higher (Stage 3 severe hypertension) is a medical emergency if accompanied by symptoms such as chest pain, shortness of breath, severe headache, numbness, visual disturbances, or confusion. You must call 999 or go directly to A&E.
Carrying excess body weight requires the cardiovascular system to pump extra blood to supply oxygen and nutrients to tissues, increasing vascular resistance and cardiac output. Clinical studies show that losing 1 kg of excess body weight can reduce systolic blood pressure by approximately 1 mmHg.
Clinical References & Authoritative Sources:
- National Institute for Health and Care Excellence (NICE): Hypertension in adults: diagnosis and management [NG136], updated 2023/2026.
- NHS England: High blood pressure (hypertension) overview & NHS Health Check (nhs.uk).
- British and Irish Hypertension Society (BIHS): Blood pressure monitoring protocol and validated monitor lists (bihsoc.org).
- Health Survey for England (HSE): Adult health and hypertension prevalence data, NHS Digital & ONS.
Important Medical Disclaimer
This blood pressure chart and interactive screening tool are provided solely for educational and informational purposes. They do not constitute formal medical diagnosis, clinical advice, or prescription guidance.
Blood pressure naturally fluctuates continuously throughout the day in response to physical activity, caffeine, emotional stress, posture, and temperature. A single high or low reading does not establish a clinical diagnosis. If you are concerned about your blood pressure readings, feel unwell, or have pre-existing cardiovascular conditions, please consult a registered GP, practice nurse, or qualified healthcare professional.