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
| Field | What to enter |
|---|---|
| Systolic pressure | In mmHg |
| Diastolic pressure | In 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) |
|---|---|
| 60 | 73 |
| 90 | 83 |
| 120 | 93 |
| 150 | 103 |
| 180 | 113 |
| 240 | 133 |
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.
Formula
MAP = DBP + (SBP − DBP) ÷ 3Worked 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.
Frequently asked questions
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.