MAP Calculator
Enter systolic and diastolic blood pressure to instantly calculate Mean Arterial Pressure (MAP) with a clinical range interpretation.
Use the MAP Calculator
Blood Pressure Inputs
The top (higher) number in a blood pressure reading.
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
Clinical Interpretation
Enter values to see interpretation
Provide systolic and diastolic pressure, then click Calculate MAP.
Step-by-Step Breakdown
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
Mean Arterial Pressure (MAP) is the time-weighted average blood pressure in the arterial system during one cardiac cycle. Because the heart spends roughly twice as long in diastole as in systole, MAP is calculated as diastolic pressure plus one-third of the pulse pressure — not a simple average of the two readings. Clinicians rely on MAP to assess organ perfusion adequacy, guide vasopressor therapy in ICU patients, and monitor hypertension treatment response.
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.