What is mean arterial pressure (MAP)?

Mean arterial pressure is the average pressure in your arteries during one cardiac cycle. Unlike the top (systolic) and bottom (diastolic) numbers of a blood pressure reading, MAP represents the true average pressure driving blood to your organs.

How is MAP calculated?

The standard formula is MAP = [Systolic + (2 × Diastolic)] / 3. It weights diastolic pressure twice because your heart spends about two-thirds of each cycle in diastole. A precise clinical calculation can also use pulse pressure, but this formula is accurate enough for most purposes.

What is a normal MAP?

A healthy MAP typically falls between 70 and 100 mmHg. A MAP of at least 60 is considered the minimum for adequate organ perfusion. Above 100 suggests hypertension; below 60 risks hypoperfusion — not enough blood reaching vital organs.

Why does MAP matter more than systolic alone?

Organ perfusion depends on average pressure, not peak pressure. Clinicians use MAP in ICUs and critical care to ensure organs receive adequate blood flow. For chronic health tracking, MAP offers a single number that integrates both systolic and diastolic trends.

Can MAP predict cardiovascular risk?

Yes. Studies show MAP is often a better predictor of cardiovascular events than systolic or diastolic pressure alone. Persistent MAP above 100 mmHg is associated with increased risk of stroke, heart attack, and kidney disease.

Does MAP change throughout the day?

Yes — blood pressure (and therefore MAP) has a natural circadian rhythm. It typically dips at night by 10-20%, rises sharply upon waking, and peaks in late morning or afternoon. For tracking purposes, measure under consistent conditions — same time of day, seated rest.

Mean Arterial Pressure Calculator

Calculate your MAP from systolic and diastolic readings and see whether your blood pressure supports healthy organ perfusion.

Calculator

Why Mean Arterial Pressure Matters

Your blood pressure reading gives you two numbers, but they describe different phases of each heartbeat — systolic is the peak, diastolic is the valley. MAP combines them into a single average that better reflects the pressure your organs actually experience.

The Formula

MAP = [Systolic + (2 × Diastolic)] / 3

MAP Reference Ranges

Range (mmHg)Interpretation

Under 60Critically low

60 – 69Low-normal

70 – 100Healthy

101 – 110Elevated

Above 110Hypertensive

Pulse Pressure

Pulse pressure (systolic minus diastolic) is another important number. A normal range is 30-50 mmHg. Wide pulse pressure (over 60) can indicate arterial stiffness. Narrow pulse pressure (under 25) can suggest heart failure or blood loss — especially when paired with a low MAP.

Medical Disclaimer

This calculator is for educational reference only. If your readings are consistently abnormal, or if you have symptoms like dizziness, chest pain, or shortness of breath, contact your healthcare provider.

Mean Arterial Pressure Calculator

Why Mean Arterial Pressure Matters

The Formula

MAP Reference Ranges

Pulse Pressure

Medical Disclaimer

Frequently Asked Questions

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