MAP CalculatorFor licensed medical professionals only
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MAP Calculator

Instantly compute mean arterial pressure to support bedside hemodynamic decisions.

Mean Arterial Pressure

Typical adult MAP ranges between 60 and 100 mmHg to sustain adequate organ perfusion.

For licensed medical professionals only

Education only. Not a substitute for clinical judgment or professional medical advice.

Designed for licensed medical professionals, supervised trainees, and allied health teams.

If this is an emergency, call your local emergency number immediately.

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How to Calculate MAP

Follow these evidence-based steps to compute mean arterial pressure using any pair of systolic and diastolic readings taken in the same session.

  1. Capture systolic blood pressure (SBP) and diastolic blood pressure (DBP) from a reliable monitor or arterial line.
  2. Multiply the diastolic value by two to represent the longer diastolic phase of the cardiac cycle.
  3. Add the systolic value to the doubled diastolic value.
  4. Divide the total by three: MAP = (SBP + 2 × DBP) ÷ 3.
  5. Compare the resulting MAP against the clinical ranges (low <60 mmHg, normal 60–100 mmHg, high >100 mmHg) alongside patient-specific factors.

Worked Example

For SBP 120 mmHg and DBP 80 mmHg: (120 + 2 × 80) ÷ 3 = 93.3 mmHg. Use this value with trend data and bedside findings before adjusting care.

Tip: Ensure readings are in millimeters of mercury (mmHg) and taken under consistent positioning to reduce variability.

What is MAP?

Mean arterial pressure (MAP) is the average arterial pressure across a single cardiac cycle and reflects the driving force that pushes blood through the vascular system.

How to Calculate?

MAP is derived from systolic and diastolic blood pressure readings. Because the heart spends more time in diastole, the diastolic value carries twice the weight of systolic pressure in the standard formula.

Standard Formula: MAP = (SBP + 2 × DBP) ÷ 3

Weighting diastolic pressure captures the longer relaxation phase of the cardiac cycle, producing a stable estimate of perfusion pressure.

Clinical Significance

Maintaining MAP within the target range safeguards tissue perfusion and guides interventions in anesthesia, critical care, and emergency medicine.

Normal Ranges

Low MAP (<60 mmHg): risk of organ hypoperfusion and potential shock.

Normal MAP (60-100 mmHg): supports adequate perfusion in most adult patients.

High MAP (>100 mmHg): may signal increased cardiac workload or hypertensive crises.

When to Use?

Use MAP when you need a concise view of perfusion pressure to align treatment plans across teams.

  • Assessing shock states or sepsis bundles in critical care.
  • Guiding vasoactive titration during anesthesia or procedural sedation.
  • Monitoring hypertensive emergencies or end-organ protection.
  • Evaluating fluid responsiveness and perfusion goals in trauma resuscitation.

Disclaimer

MAP outputs are estimates. Individual patient responses vary and require comprehensive evaluation.

Medical standards evolve quickly; review updates regularly.

Emergency Warning

If you suspect a medical emergency, call the emergency services in your region (for example 911) or go to the nearest emergency department.

Intended Audience

  • Licensed physicians and advanced practice providers
  • Registered nurses, paramedics, and allied health professionals
  • Medical and nursing students under licensed supervision

Not Appropriate For

  • Self-diagnosis or self-directed treatment by the general public
  • Situations requiring urgent or emergent medical care
  • Decisions without consulting qualified clinicians

Clinical Judgment Comes First

  • Compare calculated MAP against bedside findings and full clinical context.
  • Resolve discrepancies using your professional training and institutional protocols.
  • Document supporting evidence when incorporating calculator outputs into care plans.

Review the full medical disclaimer

Policies & Contact

Privacy Policy

We do not collect, store, or transmit personal health data. All calculations run directly in your browser so your entries remain on your device. Basic, anonymized analytics may be used to understand feature usage and keep the tool reliable.

Terms of Service

By using this tool you agree it is provided "as is" for educational reference. It is not a substitute for professional medical judgment. You are responsible for verifying results before applying them in clinical practice.

Contact

Questions or feedback? Reach out to the site administrator at [email protected].

Evidence-Based References

  1. Whelton PK, Carey RM, Aronow WS, et al. 2017 ACC/AHA/AAPA/ABC/ACPM/AGS/APhA/ASH/ASPC/NMA/PCNA guideline for the prevention, detection, evaluation, and management of high blood pressure in adults. Hypertension. 2018;71(6):e13–e115.
  2. Evans L, Rhodes A, Alhazzani W, et al. Surviving Sepsis Campaign: international guidelines for management of sepsis and septic shock 2021. Intensive Care Med. 2021;47(11):1181–1247.
  3. Saugel B, Vincent J-L, Wagner JY. Personalized blood pressure management in critically ill patients. Intensive Care Med. 2020;46(9):1704–1712.
  4. Cecconi M, De Backer D, Antonelli M, et al. Consensus on circulatory shock and hemodynamic monitoring. Intensive Care Med. 2014;40(12):1795–1815.