Mean Arterial Pressure Calculator

How to Use This Calculator

1. Enter your systolic BP and diastolic BP in mmHg.
2. The calculator returns MAP, pulse pressure, and category interpretation.
3. Use the Alt Formula tab to verify with the DBP + PP/3 equivalent.
4. Use the Professional tab to input ICP for CPP calculation and select clinical setting for vasopressor guidance.

Formula

Example

Frequently Asked Questions

• What is mean arterial pressure (MAP)? ▼
  MAP is the average arterial pressure throughout one cardiac cycle. It is calculated as MAP = (SBP + 2 × DBP) / 3 because diastole lasts approximately twice as long as systole. Normal MAP is 70–100 mmHg. MAP is more clinically useful than either SBP or DBP alone for assessing organ perfusion.
• Why is a MAP of ≥65 mmHg important in sepsis? ▼
  A MAP of at least 65 mmHg is the minimum threshold for adequate organ perfusion in septic shock, per the Surviving Sepsis Campaign guidelines. Below this level, vital organs may suffer ischemia. Vasopressors (typically norepinephrine) are titrated to maintain MAP ≥65 mmHg.
• How does MAP differ from standard blood pressure? ▼
  A standard BP reading gives systolic (SBP) and diastolic (DBP) values. MAP represents the actual weighted perfusion pressure experienced by organ capillary beds throughout the full cardiac cycle, making it the key hemodynamic target in critical care.
• What is cerebral perfusion pressure? ▼
  CPP = MAP − Intracranial Pressure (ICP). A target CPP of 60-70 mmHg is recommended in traumatic brain injury. To maintain CPP ≥60 with ICP of 20 mmHg, MAP must be ≥80 mmHg — higher than the standard sepsis target.
• What is a normal pulse pressure? ▼
  Normal pulse pressure (SBP − DBP) is 25–60 mmHg. Wide PP (>60) suggests aortic regurgitation or arterial stiffness. Narrow PP (<25) may indicate low stroke volume, tamponade, or severe aortic stenosis.

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