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Mean arterial pressure (MAP) Calculator

Arterial blood pressure can be described by systolic blood pressure (SBP), diastolic blood pressure (DBP), or mean arterial pressure (MAP). Mean arterial pressure is an indication of global perfusion pressure necessary for organ perfusion and oxygen delivery. The normal MAP is 70–100 mm Hg and a MAP of at least 60 mm Hg is necessary for adequate cerebral perfusion. Note that MAP is based largely on DBP because most of the cardiac cycle is spent in diastole. MAP = [SBP + (2 × DBP)]/3.
Systolic BP: mm Hg
Diastolic BP: mm Hg


Equation:  MAP = [(2 x diastolic)+systolic] / 3

Diastole counts twice as much as systole because 2/3 of the cardiac cycle is spent in diastole. An MAP of about 60 is necessary to perfuse coronary arteries, brain, kidneys.
Usual range:  70-110


Katz ED, Ruoff BE. Commonly Used Formulas and Calculations. In: Roberts: Clinical Procedures in Emergency Medicine. 4th ed. Elsevier Mosby Publishing; 2004:1434.


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