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Mean Arterial Pressure Calculator
Find mean arterial pressure from systolic and diastolic blood pressure.
Mean arterial pressure
—
MAP.
| Range | — |
|---|---|
| Pulse pressure | — |
| Systolic | — |
| Diastolic | — |
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Enter your figures above to see the step-by-step working.
Educational estimate — not medical adviceEverything computed client-side — nothing leaves this page
How the Mean Arterial Pressure Calculator Works
Mean arterial pressure (MAP) is the average pressure in your arteries over one heartbeat. Because the heart spends about two-thirds of each beat in diastole, MAP is weighted toward the diastolic number: diastolic pressure plus one-third of the difference between systolic and diastolic. A blood pressure of 120/80 gives a MAP of about 93 mmHg.
A MAP of roughly 70–100 mmHg is considered normal and is usually enough to perfuse the organs. Sustained values below 60–65 can starve tissues of blood, which is why MAP is watched closely in critical care. This is an educational estimate.
MAP = diastolic + (systolic − diastolic) ÷ 3
Frequently Asked Questions
What is a normal MAP?
About 70–100 mmHg. A MAP of at least 60–65 mmHg is generally needed to keep the organs adequately perfused.
How is MAP calculated?
Add one-third of the pulse pressure (systolic minus diastolic) to the diastolic pressure. Equivalently, (systolic + 2 × diastolic) ÷ 3.
Why is MAP weighted toward diastolic?
The heart spends roughly two-thirds of each cycle relaxed (diastole), so the lower diastolic pressure counts more toward the average.
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