What is the normal MAP range?

A normal MAP is generally between 70 and 100 mmHg. Values below 60 mmHg suggest inadequate organ perfusion, while values above 110 mmHg indicate hypertension that may increase stroke risk.

Why is MAP important in critical care?

MAP better reflects average perfusion pressure than systolic BP alone. In septic shock management, guidelines (Surviving Sepsis Campaign) recommend targeting MAP ≥ 65 mmHg to maintain organ perfusion.

What is the formula used to calculate MAP?

MAP = DBP + (SBP − DBP) / 3. This formula accounts for the fact that the heart spends approximately twice as long in diastole as in systole at rest. An equivalent form is MAP = (SBP + 2 × DBP) / 3.

Does MAP replace systolic or diastolic pressure readings?

No. MAP is a complementary metric used alongside individual readings. Systolic and diastolic values still carry distinct diagnostic value (e.g., pulse pressure, isolated systolic hypertension).

Can I use this calculator for pediatric patients?

The formula is the same for all ages, but normal MAP ranges differ in children. Pediatric critical care thresholds should be referenced separately based on age-specific norms.

Mean Arterial Pressure Clinical Calculator

Name: Mean Arterial Pressure Clinical Calculator
Availability: InStock
Author: Nham Vu

Calculate Mean Arterial Pressure (MAP) from systolic and diastolic blood pressure, with clinical interpretation for critical care.

Blood Pressure Inputs

Enter values in mmHg. Systolic must be greater than diastolic.

Systolic Blood Pressure (SBP)

mmHg

Diastolic Blood Pressure (DBP)

mmHg

Formula: MAP = DBP + (SBP − DBP) ÷ 3

Equivalent to: MAP = (SBP + 2 × DBP) ÷ 3

Enter blood pressure values to see MAP

Clinical MAP Ranges

Critical Low < 60 mmHg

Low 60 – 69 mmHg

Normal 70 – 100 mmHg

Elevated 101 – 110 mmHg

High > 110 mmHg

Reference ranges are general clinical guidelines. Always interpret in the context of the patient's clinical picture.

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Summary

Calculate Mean Arterial Pressure (MAP) from systolic and diastolic blood pressure, with clinical interpretation for critical care.

How it works

Enter the systolic blood pressure (the higher number) in mmHg.
Enter the diastolic blood pressure (the lower number) in mmHg.
The calculator applies the standard MAP formula: MAP = DBP + (SBP − DBP) / 3.
The result is displayed with its corresponding clinical range and meaning.
Use the Reset button to clear inputs and start a new calculation.

Use cases

ICU and critical care monitoring of organ perfusion pressure.
Assessing hemodynamic stability in emergency department patients.
Evaluating the need for vasopressor therapy (target MAP ≥ 65 mmHg in septic shock).
Quick bedside calculation during clinical rounds.
Medical student practice with blood pressure interpretation.
Pre-operative and post-operative hemodynamic assessment.

Frequently Asked Questions

Last updated: 2026-07-24 · Reviewed by Nham Vu