Mean Arterial Pressure (MAP) Calculator
Calculate MAP using the formula MAP = DBP + ⅓(SBP − DBP). Normal MAP is 70–100 mmHg; MAP above 60 mmHg is required for adequate organ perfusion.
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⚠️For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
MAP = DBP + 1/3(SBP − DBP). MAP represents average arterial pressure during one cardiac cycle. Normal 70–100 mmHg; below 65 indicates organ hypoperfusion. Surviving Sepsis targets MAP ≥65 mmHg. Sources: Surviving Sepsis Campaign, AHA, ICU guidelines.
Sources: Surviving Sepsis, AHA, ICU guidelines
Key Takeaways
- • MAP reflects perfusion pressure to vital organs
- • Sepsis resuscitation targets MAP ≥65 mmHg
- • MAP <65 suggests need for fluid or vasopressor support
- • MAP = CO × SVR (simplified hemodynamic relationship)
Did You Know?
How Does MAP Work?
Formula
MAP = DBP + (SBP − DBP) ÷ 3 = DBP + pulse pressure ÷ 3. Diastole occupies ~2/3 of the cardiac cycle.
Clinical Targets
Normal 70–100 mmHg. Sepsis: ≥65 mmHg. Severe hypotension: <50 mmHg requires urgent intervention.
Hemodynamics
MAP ≈ CO × SVR. Low MAP can result from low CO (cardiogenic) or low SVR (distributive shock).
Expert Tips
MAP Categories
| MAP (mmHg) | Category |
|---|---|
| <50 | Severe Hypotension |
| 50–60 | Moderate Hypotension |
| 60–65 | Mild Hypotension |
| 65–100 | Normal |
| >100 | Elevated |
Frequently Asked Questions
What is MAP?
Mean Arterial Pressure (MAP) is the average arterial pressure during one cardiac cycle. MAP = DBP + ⅓(SBP − DBP). Normal MAP is 70–100 mmHg; MAP above 60 mmHg is required for adequate organ perfusion.
What is the MAP formula?
MAP = DBP + ⅓(SBP − DBP) = DBP + pulse pressure ÷ 3. Example: 120/80 → MAP = 80 + 40/3 ≈ 93 mmHg. Alternative: MAP ≈ (2×DBP + SBP) ÷ 3. Diastole occupies ~2/3 of the cardiac cycle.
What is the clinical significance?
MAP reflects perfusion pressure to vital organs. MAP <65 mmHg suggests organ hypoperfusion. Surviving Sepsis Campaign targets MAP ≥65 mmHg. MAP <50 mmHg is associated with critical hypoperfusion.
MAP vs SBP/DBP?
MAP is a better indicator of organ perfusion than SBP or DBP alone. SBP and DBP are the extremes; MAP represents the time-averaged pressure driving blood flow to tissues.
What are ICU MAP targets?
Sepsis: target MAP ≥65 mmHg; consider 80–85 mmHg in chronic hypertension. Severe hypotension (<50 mmHg) requires urgent fluid or vasopressor support. Cerebral perfusion pressure = MAP − ICP.
When does MAP matter most?
MAP matters in ICU monitoring, sepsis resuscitation, shock management, and hemodynamic assessment. Low MAP can indicate hypovolemia, vasodilation, or cardiac dysfunction.
Key Statistics
Official Data Sources
⚠️ Disclaimer: This calculator is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider.