How to Calculate Mean Arterial Pressure

What is Mean Arterial Pressure?

Mean Arterial Pressure (MAP) is the average arterial pressure throughout one cardiac cycle. It represents the true perfusion pressure driving blood to vital organs.

Formula

Scale ratio: 1:50,000 means 1 cm map = 500 m reality | Distance on map × Scale = Actual distance

Step-by-Step Guide

1MAP = (SBP + 2×DBP) / 3
2Alternative: MAP = DBP + (SBP − DBP)/3
3Normal MAP: 70–100 mmHg
4MAP < 60 mmHg: inadequate organ perfusion (emergency)

Worked Examples

Input

SBP 120 mmHg, DBP 80 mmHg

Result

MAP = (120 + 2×80) / 3 = 280/3 = 93.3 mmHg (Normal)

Frequently Asked Questions

What is Map Calc?

Mean Arterial Pressure (MAP) is the average arterial pressure throughout one cardiac cycle. It represents the true perfusion pressure driving blood to vital organs

How accurate is the Map Calc calculator?

The calculator uses the standard published formula for map calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Map Calc calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Map Calc calculator use?

The core formula is: MAP = (SBP + 2×DBP) / 3. Each step in the calculation is shown so you can verify the result manually.

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