Mean Arterial Pressure Calculator

Calculates arterial MAP from systolic and diastolic blood pressure.

Inputs

Color mode links each input to the matching equation term and solving arithmetic.

Equation and Work

Equation:
Solving steps:
2 × DBP
—
mmHg
MAP
—
mmHg
Normal/reference: MAP 80–100 mmHg; prolonged MAP <60 mmHg is listed as hypotension concern.

Clinical Significance

Mean arterial pressure estimates average arterial pressure over one cardiac cycle. The constants 2 and 3 reflect the common approximation that diastole lasts about twice as long as systole, so DBP is counted twice and the three pressure parts are averaged.

MAP is used for perfusion assessment and can also be applied to pulmonary artery pressures when calculating MPAP from PAP values.

The formula assumes a conventional resting relationship between systole and diastole; direct arterial tracing is preferred when available.

References (APA 7th Edition)

  1. Attached equations reference supplied by the user for calculator equation confirmation.