# MAP Calculator (Mean Arterial Pressure)

URL: https://speedycalculator.com/calculators/health/mean-arterial-pressure/
Last updated: 2026-10-25

> The MAP calculator estimates mean arterial pressure, the average pressure in the arteries over one heartbeat, from systolic and diastolic blood pressure. A MAP of about 65 mmHg is often used as the minimum to keep organs perfused.

## Inputs

- Systolic pressure (mmHg)
- Diastolic pressure (mmHg)

## Results

- Mean arterial pressure
- Pulse pressure

## Formula

```
MAP = DBP + (SBP − DBP) ÷ 3
```

## Explanation

Because the heart spends longer relaxing than contracting, MAP is closer to the diastolic pressure than to the simple average.

### How to use the MAP Calculator

- **Systolic pressure**
- **Diastolic pressure**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Add one third of the pulse pressure to the diastolic pressure.

### Inputs explained

FieldWhat to enterSystolic pressureIn mmHgDiastolic pressureIn mmHg

### What each result means

- **Mean arterial pressure** = [Diastolic pressure] + ([Systolic pressure] - [Diastolic pressure])÷3
- **Pulse pressure** = [Systolic pressure] - [Diastolic pressure]

### Example values

How the main result changes when **Systolic pressure** changes and everything else stays at the example values above:

Systolic pressure (mmHg)Mean arterial pressure (mmHg)6073908312093150103180113240133
*Health note: this calculator is for education and screening only and is not a diagnosis or treatment advice. Discuss your results with a qualified clinician.*

## Worked example

Inputs — Systolic pressure: 120 mmHg; Diastolic pressure: 80 mmHg.

Results — **Mean arterial pressure = 93 mmHg**; Pulse pressure = 40 mmHg.

## Key terms

- **Pulse pressure**: Systolic minus diastolic pressure.

## FAQ

**What is a normal MAP?**
Roughly 70–100 mmHg in adults.

**Is this the same as blood pressure?**
No, it is a derived average of systolic and diastolic values.

**What formula does the MAP Calculator use?**
MAP = DBP + (SBP − DBP) ÷ 3.


## Sources

- [StatPearls – Physiology, Mean Arterial Pressure](https://www.ncbi.nlm.nih.gov/books/NBK538226/)