Question 1

What is mean arterial pressure (MAP)?

Accepted Answer

MAP is the average pressure driving blood through the arteries over one full cardiac cycle. Because the heart spends more time in diastole than systole, it isn’t a simple average of systolic and diastolic pressure — diastolic pressure is weighted more heavily.

Question 2

What is a normal MAP?

Accepted Answer

For most adults, a MAP of roughly 70 to 100 mmHg is considered typical. A MAP of at least 60 mmHg is generally considered the minimum needed to adequately perfuse the coronary arteries, brain, and kidneys, though the right target varies by patient and clinical context.

Question 3

Why do clinicians use MAP instead of just systolic or diastolic pressure?

Accepted Answer

MAP better reflects the actual perfusion pressure organs experience across the whole cardiac cycle, which is why it’s commonly used in critical care, anesthesia, and sepsis management — for example, as a resuscitation target in septic shock.

Question 4

How is MAP calculated?

Accepted Answer

The standard formula is MAP = DBP + ⅓(SBP − DBP), which is mathematically equivalent to (SBP + 2×DBP) ⁄ 3. Both forms give the same result; this calculator uses the first.

Question 5

Is this calculator a substitute for a monitor or clinical judgment?

Accepted Answer

No. This tool computes the standard formula from numbers you enter — it doesn’t measure blood pressure and isn’t a substitute for a validated monitor, continuous arterial line monitoring, or a clinician’s assessment.

MAP	Interpretation
< 60 mmHg	Often insufficient for vital organ perfusion
60–69 mmHg	Below the typical range
70–100 mmHg	Typical range for adults
> 100 mmHg	Above the typical range

MAP Calculator

How MAP is calculated

Typical MAP ranges

Common questions