What is mean arterial pressure (MAP)?

MAP is the time-weighted average arterial pressure during one cardiac cycle—the pressure driving blood into organs. It is derived from systolic (SBP) and diastolic (DBP) blood pressure because the heart spends more time in diastole. ICU teams track MAP (often via arterial lines) as a perfusion target, especially in shock and sepsis.

How do you calculate MAP from blood pressure?

Standard formula: MAP = DBP + (SBP − DBP) ÷ 3, equivalent to MAP = (SBP + 2×DBP) ÷ 3. Example: BP 120/80 → MAP = 80 + (120−80)/3 = 80 + 13.3 = 93.3 mmHg. The diastolic term is weighted twice because diastole lasts longer than systole in each beat.

What is a normal MAP range?

Often quoted 70–100 mmHg for hemodynamically stable adults. MAP 100 mmHg suggests elevated mean pressure and cardiovascular risk if sustained—interpret with full BP and comorbidities.

Why is MAP used instead of systolic blood pressure alone?

SBP swings beat-to-beat; MAP is smoother and correlates with perfusion. You can have “normal” SBP with dangerous MAP—e.g., isolated diastolic hypertension 120/100 gives MAP ≈107 mmHg. Conversely, wide pulse pressure (e.g., 160/50) also shifts MAP. MAP integrates both components for hemodynamic teaching and critical care targets.

What MAP is needed in septic shock?

Surviving Sepsis Campaign guidelines have recommended MAP ≥65 mmHg as an initial vasopressor goal after fluids, with consideration of higher targets (75–80) in patients with chronic hypertension or delayed organ injury—evidence evolves, so follow current institutional protocols. This calculator does not set ICU orders.

What does MAP below 60 mmHg mean?

Inadequate perfusion pressure for many organs if prolonged—risk of acute kidney injury, altered mental status, and myocardial ischemia. Causes include hemorrhage, sepsis, cardiogenic shock, anaphylaxis, and drugs. Example: BP 85/50 → MAP ≈61.7 mmHg (borderline). Symptomatic hypotension or shock requires emergency care, not online interpretation alone.

How does cerebral perfusion pressure relate to MAP?

Cerebral perfusion pressure (CPP) ≈ MAP − intracranial pressure (ICP). In brain injury, clinicians may target CPP (e.g., 60–70 mmHg) rather than MAP alone. Healthy brains autoregulate blood flow across a MAP range, but injured brains are more sensitive to hypotension.

Can MAP be high with only one BP number elevated?

Yes. Isolated diastolic hypertension (120/100) → MAP ≈107 mmHg. Isolated systolic hypertension in older adults (170/65) → MAP ≈100 mmHg. Both patterns warrant cardiovascular assessment even when one component looks “okay.”

How is MAP measured in the hospital?

Non-invasive cuff estimates SBP/DBP, then MAP is calculated. In ICU, invasive arterial catheters display continuous MAP (often more reliable for titrating vasopressors). Always document whether MAP is measured or derived.

Is pulse pressure related to MAP?

Pulse pressure = SBP − DBP. Wide pulse pressure (e.g., stiff arteries) raises MAP less than diastolic elevation does for the same average. MAP is not the same as pulse pressure—it is the weighted average of the two pressures.

How accurate is this MAP calculator?

The math matches standard textbooks and monitor algorithms. Clinical accuracy depends on correct BP measurement (cuff size, arm position, rest, no talking). For treatment decisions in critical illness, use calibrated invasive monitoring and clinician judgment.

When should I seek emergency care for blood pressure?

Seek emergency care for BP ≥180/120 with symptoms (chest pain, shortness of breath, neurologic deficits), or for shock signs (confusion, cold clammy skin, oliguria) regardless of calculated MAP. This tool is for education, not triage.

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Hemodynamics & vital signs

Blood Pressure MAP Calculator

Calculate mean arterial pressure (MAP) in mmHg from systolic and diastolic blood pressure. MAP reflects average perfusion pressure for the brain, kidneys, and heart—commonly targeted at ≥65 mmHg in ICU sepsis care. Educational tool for students, nurses, and trainees; not for treatment decisions.

Last updated: June 4, 2026

Standard MAP = DBP + ⅓(SBP − DBP)

Hypotension, normal, and hypertensive bands

Organ perfusion and ICU target notes

MAP Calculator

Calculate Mean Arterial Pressure from blood pressure

Systolic Blood Pressure (mmHg)

Top number - pressure during heart contraction

Diastolic Blood Pressure (mmHg)

Bottom number - pressure during heart relaxation

MAP Analysis

Mean Arterial Pressure (MAP)

93.3 mmHg

Normal

Interpretation:

Typical range for adequate tissue perfusion

Risk Level:

Low risk

Organ Perfusion Status:

Adequate for most organ beds

Clinical Recommendations:

•Stage 1 hypertension pattern — lifestyle and monitoring
•Continue routine BP monitoring and cardiovascular risk reduction
•Correlate with symptoms and comorbidities

MAP Formula:

MAP = Diastolic + ⅓(Systolic - Diastolic)

• Normal MAP: 70-100 mmHg
• Minimum for organ perfusion: 60 mmHg
• Target in ICU: 65-70 mmHg minimum
• Values reflect average pressure during cardiac cycle

Example MAP values

120/80 mmHg

93.3

Normal

90/60 mmHg

MAP 70 — ICU floor reference

85/50 mmHg

61.7

Low normal

180/110 mmHg

133.3

Hypertensive (high)

MAP formula

MAP = DBP + (SBP − DBP) ÷ 3

MAP = (SBP + 2 × DBP) ÷ 3

Diastolic pressure is weighted 2:1 because diastole occupies roughly two-thirds of the cardiac cycle.

Common blood pressures → MAP

Blood pressure	MAP (mmHg)	Note
120/80	93.3	Classic “normal” example
90/60	70	MAP 70 — lower normal
110/70	83.3	Common ambulatory reading
140/90	106.7	Stage 2 BP pattern; MAP elevated
180/110	133.3	Severe hypertension; MAP very high
85/50	61.7	Hypotension pattern; MAP <65

MAP interpretation chart

MAP	Category	Perfusion	Teaching action
< 60 mmHg	Hypotensive	Inadequate for most vital organs	Urgent assessment; shock workup
60–69 mmHg	Low normal	ICU floor target (~65) in sepsis	Close monitoring; treat cause
70–99 mmHg	Normal	Adequate for brain, kidney, heart	Routine care and prevention
100–109 mmHg	Elevated	Adequate but higher afterload	Risk reduction, treat if hypertensive
≥ 110 mmHg	High	Chronic end-organ risk if sustained	Hypertension management

Organ perfusion and MAP targets

Context	Target / concept	Low MAP concern
Brain	CPP = MAP − ICP; autoregulation ~MAP 60–150 in health	Confusion, stroke risk if prolonged hypotension
Kidneys	Often cited MAP ≥60–65 for GFR	AKI risk with sustained MAP <65
Heart (coronary)	Coronary flow mainly in diastole; MAP reflects perfusion pressure	Angina/ischemia if MAP inadequate
ICU (sepsis)	Surviving Sepsis: MAP ≥65 mmHg (individualized)	Vasopressors after fluid resuscitation

Worked example: BP 120/80

MAP = 80 + (120 − 80) ÷ 3 = 80 + 13.3 = 93.3 mmHg

Falls in the normal band (70–99) with adequate perfusion teaching label.

References

Surviving Sepsis Campaign — Hemodynamic targets
American Heart Association — Blood pressure
Marino's The ICU BookHemodynamic monitoring and MAP in critical care.

Not medical advice. Hypotension, hypertensive emergency, and shock require licensed care and facility protocols—not a website calculator.

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Hemodynamics & vital signs

Blood Pressure MAP Calculator

Last updated: June 4, 2026

Standard MAP = DBP + ⅓(SBP − DBP)

Hypotension, normal, and hypertensive bands

Organ perfusion and ICU target notes

MAP Calculator

Calculate Mean Arterial Pressure from blood pressure

Systolic Blood Pressure (mmHg)

Top number - pressure during heart contraction

Diastolic Blood Pressure (mmHg)

Bottom number - pressure during heart relaxation

MAP Analysis

Mean Arterial Pressure (MAP)

93.3 mmHg

Normal

Interpretation:

Typical range for adequate tissue perfusion

Risk Level:

Low risk

Organ Perfusion Status:

Adequate for most organ beds

Clinical Recommendations:

•Stage 1 hypertension pattern — lifestyle and monitoring
•Continue routine BP monitoring and cardiovascular risk reduction
•Correlate with symptoms and comorbidities

MAP Formula:

MAP = Diastolic + ⅓(Systolic - Diastolic)

• Normal MAP: 70-100 mmHg
• Minimum for organ perfusion: 60 mmHg
• Target in ICU: 65-70 mmHg minimum
• Values reflect average pressure during cardiac cycle

Example MAP values

120/80 mmHg

93.3

Normal

90/60 mmHg

MAP 70 — ICU floor reference

85/50 mmHg

61.7

Low normal

180/110 mmHg

133.3

Hypertensive (high)

MAP formula

MAP = DBP + (SBP − DBP) ÷ 3

MAP = (SBP + 2 × DBP) ÷ 3

Diastolic pressure is weighted 2:1 because diastole occupies roughly two-thirds of the cardiac cycle.

Common blood pressures → MAP

Blood pressure	MAP (mmHg)	Note
120/80	93.3	Classic “normal” example
90/60	70	MAP 70 — lower normal
110/70	83.3	Common ambulatory reading
140/90	106.7	Stage 2 BP pattern; MAP elevated
180/110	133.3	Severe hypertension; MAP very high
85/50	61.7	Hypotension pattern; MAP <65

MAP interpretation chart

MAP	Category	Perfusion	Teaching action
< 60 mmHg	Hypotensive	Inadequate for most vital organs	Urgent assessment; shock workup
60–69 mmHg	Low normal	ICU floor target (~65) in sepsis	Close monitoring; treat cause
70–99 mmHg	Normal	Adequate for brain, kidney, heart	Routine care and prevention
100–109 mmHg	Elevated	Adequate but higher afterload	Risk reduction, treat if hypertensive
≥ 110 mmHg	High	Chronic end-organ risk if sustained	Hypertension management

Organ perfusion and MAP targets

Context	Target / concept	Low MAP concern
Brain	CPP = MAP − ICP; autoregulation ~MAP 60–150 in health	Confusion, stroke risk if prolonged hypotension
Kidneys	Often cited MAP ≥60–65 for GFR	AKI risk with sustained MAP <65
Heart (coronary)	Coronary flow mainly in diastole; MAP reflects perfusion pressure	Angina/ischemia if MAP inadequate
ICU (sepsis)	Surviving Sepsis: MAP ≥65 mmHg (individualized)	Vasopressors after fluid resuscitation