Blood Pressure Calculator UK NHS + MAP
NHS-aligned tool to calculate your blood pressure category, mean arterial pressure, 7‑day average, and age‑based insight. Trusted for home monitoring in England, Scotland, Wales & NI.
Instant BP & MAP Calculator
Enter your systolic & diastolic (mmHg) — based on 2026 UK guidelines.
📊 Blood pressure classification: Normal
❤️ Mean Arterial Pressure (MAP): -- mmHg (target: 70–100)
🔄 Pulse Pressure: -- mmHg
Based on NICE NG136 (UK 2026)
Blood pressure by age & interpretation
UK reference: ideal adult BP < 120/80 mmHg. Stage 1 hypertension ≥135/85 (home avg) or ≥140/90 (clinic).
| Category (UK) | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Low (Hypotension) | <90 | <60 |
| Ideal / Normal | 90–119 | 60–79 |
| Elevated (Pre-high) | 120–129 | <80 |
| High Stage 1 | 130–139 | 80–89 |
| High Stage 2 | ≥140 | ≥90 |
| Hypertensive Crisis | ≥180 | ≥120 |
MAP = DBP + 1/3(SBP-DBP). Normal MAP 70-100mmHg ensures organ perfusion.
7‑day average blood pressure calculator (UK / NHS style)
SD + MAP averageAdd your daily readings (systolic/diastolic). We'll compute average systolic, average diastolic, average MAP, and standard deviation of systolic — ideal for 7‑day monitoring logs.
No readings added yet. Add at least 2–7 readings for average and standard deviation.
— mmHg (avg systolic) | — mmHg (avg diastolic)
— mmHg (mean arterial pressure average) | — (SD of systolic readings)
Based on 0 readings. Use for 7‑day BP diary or weekly average.
How to calculate average blood pressure over a week (NHS method)
To get a reliable blood pressure average, the NHS recommends taking two readings each morning and evening for 7 days, discarding the first day's readings. Then calculate the average of all remaining measurements. Our 7‑day average tool replicates this logic: simply enter your systolic/diastolic values and the calculator will show mean systolic, mean diastolic, and MAP. Use the standard deviation to assess consistency.
How to calculate MAP & mean arterial pressure (formula)
Mean arterial blood pressure calculation: MAP = Diastolic + (Systolic - Diastolic) / 3. A MAP ≥ 60 mmHg is needed for adequate tissue perfusion. Our main calculator above automatically computes MAP, helping clinicians and patients understand organ perfusion risk. For a map blood pressure calculator, simply enter any systolic/diastolic values.
🔢 Step-by-step: how do you calculate blood pressure from heart rate?
While heart rate doesn't directly determine BP, you can estimate pulse pressure: SBP - DBP. The blood pressure calculation using MAP gives a better representation of average arterial pressure across the cardiac cycle. Our tools provide both instant MAP and weekly MAP average.
Blood pressure by age & gender (UK reference 2026)
| Age (years) | Typical systolic (men) | Typical systolic (women) | Healthy diastolic |
|---|---|---|---|
| 18–29 | 95–120 | 90–115 | 60–75 |
| 30–44 | 100–125 | 95–120 | 65–80 |
| 45–59 | 110–130 | 105–125 | 70–85 |
| 60+ | 115–135 | 110–130 | 70–85 |
Use the age field in the main calculator to see if your BP aligns with the expected range. This blood pressure by age calculator helps contextualize your numbers.
Important Medical Disclaimer
TotalCalcHub provides calculators for informational and educational purposes only. This blood pressure tool follows NHS / NICE 2026 guidelines but is not a substitute for professional medical advice. Always consult a GP or hypertension specialist before making health decisions. Results are estimates; do not use for emergency diagnosis. If you have concerns about high blood pressure, see your NHS GP.
Updated for 2026 UK clinical standards. For life expectancy or cardiovascular risk, please refer to QRISK3 or your clinician.
Frequently asked questions: blood pressure calculator UK
NHS states ideal is below 120/80 mmHg. High blood pressure is 135/85 mmHg or higher for home average readings.
MAP shows average pressure in arteries, important for assessing perfusion. Our calculator does MAP automatically.
Use our "7‑day average blood pressure calculator" above: add each day’s systolic/diastolic, and get average systolic, diastolic, MAP, plus standard deviation.
Yes, use the age input in the first calculator to compare your numbers with typical ranges for your age group (UK data).
MAP = mean arterial pressure. It's a key cardiovascular marker. You can calculate MAP from blood pressure using the formula provided.
This tool is not specifically for gestational hypertension. Always consult a midwife or obstetrician for pregnancy BP ranges.
Our algorithm reflects NICE 2026 thresholds for hypertension diagnosis based on systolic/diastolic values, consistent with NHS digital guidelines.