MAP Calculator (Mean Arterial Pressure)
MAP = (2×DBP + SBP) ÷ 3.
Mean arterial pressure — driving pressure for organ perfusion.
How the Math Works
The Mean Arterial Pressure (MAP) Calculator uses the formula MAP = (2×DBP + SBP) ÷ 3 to estimate average arterial pressure during a cardiac cycle. This weighted calculation gives twice as much importance to diastolic pressure (DBP) because the heart spends more time in diastole than systole. To compute it, multiply the diastolic reading by 2, add the systolic reading (SBP), then divide the sum by 3. For example, with SBP 120 mmHg and DBP 80 mmHg: (2×80 + 120) ÷ 3 = 93.3 mmHg.
Practical Applications
To use this calculator, first measure blood pressure using a cuff to obtain systolic (peak pressure during heart contraction) and diastolic (minimum pressure between beats) values in mmHg. Enter these numbers into the MAP Calculator, which automatically applies the formula. The result provides a single pressure value representing average arterial pressure throughout one heartbeat cycle, useful for healthcare professionals when assessing circulation adequacy, especially in critical care settings where maintaining organ perfusion is essential.
Day-to-Day Use
Understanding your MAP helps you better interpret blood pressure readings beyond just systolic and diastolic numbers. A normal MAP is typically 70-100 mmHg; values consistently above 100 may indicate hypertension requiring attention. Tracking MAP trends over time allows you to gauge how lifestyle changes, medications, or stress impact your cardiovascular health, empowering you to make informed decisions about exercise, diet, and medical consultations for optimal heart function.
FAQ
Normal MAP?
70–100 mmHg is typical.