🩸 Mean Arterial Pressure (MAP) Calculator
Estimate Mean Arterial Pressure (MAP) from systolic and diastolic blood pressure. Instant, browser-side calculation.
Clinical takeaway
MAP < 65 mmHg suggests inadequate organ perfusion.
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When to use
Bedside estimate of perfusion pressure. An arterial line gives the true MAP.
How it works
MAP ≈ DBP + (SBP − DBP)/3. A common resuscitation target is MAP ≥ 65 mmHg.
Key points
- MAP < 65 mmHg suggests inadequate organ perfusion.
- The 1/3 estimate is least accurate at high heart rates.
- Targets are individualised (e.g. higher in chronic hypertension).
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Systolic BP | 120 mmHg |
|---|---|
| Diastolic BP | 80 mmHg |
→MAP93mmHg
- Formula：MAP = DBP + (SBP − DBP)/3
- Typical target：≥ 65 mmHg for organ perfusion
Frequently asked questions
- What is Mean Arterial Pressure (MAP) Calculator?
- Estimate Mean Arterial Pressure (MAP) from systolic and diastolic blood pressure. Instant, browser-side calculation.
- How is Mean Arterial Pressure (MAP) Calculator calculated? What is the core formula?
- MAP ≈ DBP + (SBP − DBP)/3. A common resuscitation target is MAP ≥ 65 mmHg.
- When is Mean Arterial Pressure (MAP) Calculator used?
- Bedside estimate of perfusion pressure. An arterial line gives the true MAP.
- What are the key clinical points for Mean Arterial Pressure (MAP) Calculator?
- MAP < 65 mmHg suggests inadequate organ perfusion. The 1/3 estimate is least accurate at high heart rates. Targets are individualised (e.g. higher in chronic hypertension).
- What are the limits and cautions when using Mean Arterial Pressure (MAP) Calculator?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Mean Arterial Pressure (MAP) Calculator calculated in practice? Can you show a worked example?
- Inputs: Systolic BP 120 mmHg, Diastolic BP 80 mmHg → Result: MAP 93 mmHg（Formula: MAP = DBP + (SBP − DBP)/3, Typical target: ≥ 65 mmHg for organ perfusion）