Mean Arterial Pressure (MAP)
Calculate mean arterial pressure from systolic and diastolic blood pressure readings. MAP approximates perfusion pressure to vital organs. Normal range: 70–105 mmHg.
Results
What is it?
Calculates Mean Arterial Pressure using the standard formula: MAP = DBP + ⅓(SBP − DBP). MAP represents the average arterial pressure during a single cardiac cycle and is the primary determinant of organ perfusion. Normal MAP is 70–105 mmHg; below 60 mmHg risks end-organ ischemia.
How to use
Enter your systolic (top number) and diastolic (bottom number) blood pressure readings in mmHg. The calculator outputs MAP and pulse pressure (SBP − DBP).
Example scenario
A reading of 120/80 mmHg: MAP = 80 + (120 − 80)/3 = 93.3 mmHg (normal). Pulse pressure = 40 mmHg (normal is 30–50). A MAP of 65 mmHg in a critically ill patient would signal inadequate perfusion requiring intervention.
Pro tip
MAP is more clinically meaningful than systolic or diastolic BP alone for assessing organ perfusion. In ICU settings, vasopressors are titrated to maintain MAP ≥ 65 mmHg. A widened pulse pressure (> 60 mmHg) may indicate aortic regurgitation or arterial stiffness.