wikiHow Mean Arterial Blood Pressure Calculator To calculate the mean arterial blood pressure (MAP), you can use the following formula: MAP = (2/3 x diastolic pressure) + (1/3 x systolic pressure) Here's an example of how to use this formula: Measure the systolic blood pressure (SBP) and diastolic blood pressure (DBP) using a blood pressure cuff. Let's say the SBP is 120 mmHg and the DBP is 80 mmHg. Plug the values into the formula: MAP = (2/3 x 80) + (1/3 x 120) = 93.33 mmHg. Round the answer to the nearest whole number: MAP = 93 mmHg. So, in this example, the mean arterial blood pressure (MAP) is 93 mmHg. Page