MAP Calculator

Mean Arterial Pressure (MAP) Calculator

Calculate Mean Arterial Pressure to assess organ perfusion and circulatory stability. Essential tool for medical professionals and students.

100% FreeClinical FormulaOrgan Perfusion Assessment

MAP Calculator

Calculate Mean Arterial Pressure using systolic and diastolic blood pressure values

Systolic Blood Pressure (mm Hg) *

Normal range: 100 - 120 mm Hg

Diastolic Blood Pressure (mm Hg) *

Normal range: 60 - 80 mm Hg

Common Blood Pressure Examples

Click on any example to automatically fill the calculator

Example

Normal blood pressure

Systolic: 120 mm Hg

Diastolic: 80 mm Hg

Example

Stage 1 hypertension

Systolic: 140 mm Hg

Diastolic: 90 mm Hg

Example

Hypotension

Systolic: 90 mm Hg

Diastolic: 60 mm Hg

Example

Stage 2 hypertension

Systolic: 160 mm Hg

Diastolic: 100 mm Hg

What is Mean Arterial Pressure?

Mean Arterial Pressure (MAP) represents the average pressure in the arteries during one cardiac cycle. It's calculated using the formula that gives more weight to diastolic pressure since the heart spends more time in diastole.

Formula: $MAP = \frac{Systolic + 2 \times Diastolic}{3}$
Physiology: Diastole lasts ~2/3 of cardiac cycle, hence the 2:1 weighting

Key Concepts:

Perfusion Pressure: MAP drives blood flow to vital organs
Cardiac Cycle: Integrates both systolic and diastolic phases
Clinical Target: $MAP \geq 65$ mm Hg for adequate organ perfusion
Monitoring: Essential in critical care and anesthesia

Normal MAP Range & Interpretation

70–100 mm Hg

Normal range with adequate organ perfusion

< 65 mm Hg

Critical - inadequate perfusion, requires immediate intervention

> 100 mm Hg

Elevated - may indicate hypertension or increased cardiovascular strain

Clinical Note: Individual patient factors, comorbidities, and clinical context may require adjustment of these ranges.

MAP vs. Systolic/Diastolic Blood Pressure

Systolic BP

Peak pressure during ventricular contraction. Represents maximum arterial pressure.

MAP

Average pressure over entire cardiac cycle. Better indicator of organ perfusion.

Diastolic BP

Minimum pressure during ventricular relaxation. Sustained pressure between beats.

Key Insight: MAP integrates both systolic (peak) and diastolic (sustained) pressure, making it more representative of average tissue perfusion than either value alone.

Why Use Our MAP Calculator?

Clinical Accuracy

Uses standard MAP formula with proper validation

Educational Content

Comprehensive clinical context and interpretation

Clinical Pearls

Evidence-based recommendations and pitfalls

Free & Professional

No registration, medical-grade tool

Authoritative Blood Pressure Resources

American Heart Association

Blood pressure guidelines, categories, and management recommendations

Cleveland Clinic

Mean arterial pressure overview, normal ranges, and clinical significance

NCBI MAP Reference

Peer-reviewed research on mean arterial pressure and organ perfusion

Frequently Asked Questions

What is Mean Arterial Pressure (MAP)?

MAP is the average blood pressure during a cardiac cycle and represents perfusion pressure to vital organs. MAP = DBP + 1/3 × (SBP − DBP), equivalent to (SBP + 2·DBP) / 3.

What is a normal MAP?

Typically 70-100 mmHg. Below 60 mmHg may cause inadequate organ perfusion; above 110 mmHg indicates hypertension. Target MAP varies by clinical context.

Why is MAP important clinically?

MAP determines organ blood flow. Kidneys need MAP > 65 mmHg; the brain autoregulates between 50-150 mmHg. Critical care typically targets MAP ≥ 65 mmHg.

How is MAP different from systolic/diastolic pressure?

Systolic is the peak during contraction; diastolic is the lowest during relaxation. MAP weights diastole more because it lasts longer, better representing constant perfusion pressure.

When should I be concerned about MAP?

MAP < 60: risk of organ damage. MAP < 50: critical hypoperfusion. MAP > 110: hypertensive range. Always consider symptoms alongside numbers.

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