Mean Arterial Pressure (MAP) Calculator

Calculate mean arterial pressure from systolic and diastolic blood pressure readings.

Systolic blood pressure (mmHg) (mmHg)

Diastolic blood pressure (mmHg) (mmHg)

Heart rate (bpm, optional) (bpm)

For pulse pressure calculation

Please check your inputs and try again.

Worked Examples

Example 1: Normal BP: 120/80

MAP = 80 + 40/3

Result: 93 mmHg — normal

Normal organ perfusion

Example 2: Shock: BP 90/60

MAP = 60 + 30/3

Result: 70 mmHg — borderline

MAP <65 = hypotension requiring intervention

Frequently Asked Questions

Why is MAP preferred to systolic pressure?

MAP represents the average pressure driving organ perfusion over a complete cardiac cycle. Critical organs (kidneys, brain) need MAP ≥65 mmHg for adequate perfusion.

What MAP is needed for organ perfusion?

MAP ≥65 mmHg: general threshold. Brain: cerebral perfusion pressure = MAP − ICP; needs CPP ≥60. Kidneys: need MAP ≥70-75 to maintain GFR. ICU target: MAP ≥65 mmHg in septic shock.