What is a normal MAP value?

A normal MAP for healthy adults is approximately 70 to 100 mmHg. Clinical guidelines for critically ill patients typically target a MAP of at least 65 mmHg to ensure adequate perfusion of the brain, heart, and kidneys.

Why is MAP weighted toward diastolic pressure?

The heart spends about two-thirds of each cardiac cycle in diastole and one-third in systole. Because diastolic phase is longer, MAP is calculated as DBP + (SBP − DBP) / 3, which gives more weight to the diastolic reading than a simple arithmetic mean would.

What does a low MAP indicate?

A MAP below 60 mmHg suggests the organs may not be receiving adequate blood flow, which can lead to shock, acute kidney injury, or ischemic events. Persistent low MAP warrants immediate medical evaluation.

What does a high MAP indicate?

A MAP above 110 mmHg indicates hypertension. Chronically elevated MAP increases cardiac workload and raises the risk of stroke, heart attack, and kidney damage. A healthcare provider should be consulted for management.

Is this tool a substitute for medical advice?

No. This calculator is for educational and informational purposes only. Always consult a qualified healthcare professional for diagnosis, clinical decision-making, or treatment of any medical condition.

What units should I enter?

Enter blood pressure values in millimeters of mercury (mmHg), which is the standard unit reported by sphygmomanometers (blood pressure cuffs). Do not enter units — numbers only.

MAP Calculator

Name: MAP Calculator
Availability: InStock
Author: Nham Vu

Enter systolic and diastolic blood pressure to instantly calculate Mean Arterial Pressure (MAP) with a clinical range interpretation.

Blood Pressure Inputs

Systolic Pressure (SBP)

mmHg

The top (higher) number in a blood pressure reading.

Diastolic Pressure (DBP)

mmHg

The bottom (lower) number in a blood pressure reading.

Formula

MAP = DBP + (SBP − DBP) / 3

Weighted average reflecting the longer diastolic phase.

Mean Arterial Pressure

mmHg

Low Normal High

40 70 100 110+

Clinical Interpretation

Enter values to see interpretation

Provide systolic and diastolic pressure, then click Calculate MAP.

MAP Clinical Reference Ranges

Range (mmHg)	Classification	Clinical Significance
< 60	Critically Low	Inadequate organ perfusion; emergency evaluation required.
60 – 69	Low / Borderline	Marginal perfusion; may cause dizziness or lightheadedness.
70 – 100	Normal	Adequate perfusion pressure for most healthy adults.
101 – 110	Elevated	Pre-hypertension range; lifestyle review is recommended.
> 110	High	Hypertension; consult a healthcare provider for management.

For informational purposes only — not a substitute for professional medical advice.

Summary

Enter systolic and diastolic blood pressure to instantly calculate Mean Arterial Pressure (MAP) with a clinical range interpretation.

How it works

Enter your systolic blood pressure (SBP) — the top number from a blood pressure reading — in mmHg.
Enter your diastolic blood pressure (DBP) — the bottom number — in mmHg.
The calculator applies the standard clinical formula: MAP = DBP + (SBP − DBP) / 3.
The result appears instantly alongside a visual range bar showing where your MAP falls.
Read the color-coded clinical interpretation to understand what the value means for organ perfusion.
Review the step-by-step calculation breakdown to verify the math.

Use cases

Estimate MAP from a routine blood pressure measurement.
Check whether MAP meets the minimum perfusion threshold of 60–65 mmHg.
Monitor hypertension management and track improvement over time.
Support nursing exam preparation and medical school study.
Assist critical care and emergency clinicians in rapid bedside calculations.
Educate patients on how blood pressure affects organ blood flow.
Verify MAP calculations done manually during clinical procedures.
Research and academic use where a fast, reliable MAP formula tool is needed.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu