Medical & Clinical
Mean Arterial Pressure Calculator
Organs don't care about your peak pressure — they care about the average. MAP is that number.
Mean arterial pressure (MAP) is the average pressure driving blood into the organs, calculated as (systolic + 2 × diastolic) ÷ 3. A MAP of 70–100 mmHg is generally considered adequate for organ perfusion; below 65 risks under-perfusion. Interpretation belongs to your clinician — use these numbers to ask better questions.
MAP = (SBP + 2×DBP) ÷ 3.
Adequate: 70–100 mmHg.
Below 65 mmHg risks organs.
Calculate Your Mean Arterial Pressure
Mean Arterial Pressure
What Is Mean Arterial Pressure?
Mean arterial pressure (MAP) is the time-weighted average pressure in the arteries across one cardiac cycle — because diastole lasts roughly twice as long as systole, the formula double-weights diastolic pressure.
MAP is the pressure that actually pushes blood through the organs. In critical care, 65 mmHg is the widely used minimum target for adequate perfusion.
How It Is Calculated
MAP = (SBP + 2 × DBP) ÷ 3
Example: Example: 120/80 → MAP ≈ 93 mmHg (adequate perfusion)
MAP interpretation (general)
| MAP | Interpretation |
|---|---|
| < 65 mmHg | Below perfusion target — clinical evaluation |
| 65–70 | Borderline — monitor closely |
| 70–100 | Adequate for most adults |
| 100–110 | Elevated — consistent with hypertension |
| ≥ 110 | High — sustained hypertension marker |
Limitations
- The 65 mmHg threshold comes from critical-care practice, not outpatient settings.
- MAP from a single cuff reading is an estimate; arterial lines measure it directly in ICU settings.
Sources & Review
References used for this calculator’s formulas and thresholds:
Mean Arterial Pressure FAQ
What is a normal MAP?
70–100 mmHg is generally adequate for most adults; critical care aims for at least 65 mmHg.
Why does MAP double-weight diastolic?
The heart spends about twice as long in diastole as systole, so the true time-average pressure sits closer to diastolic.
Is MAP more important than blood pressure?
For organ perfusion, yes — MAP is the driving pressure. For cardiovascular risk classification, systolic and diastolic categories matter more.
Important disclaimer: Results are educational estimates, not a substitute for professional medical advice. Discuss your results with a qualified professional before making decisions.