Mean Arterial Pressure Calculator
Calculate mean arterial pressure from systolic and diastolic blood pressure readings using this free MAP calculator in your browser.
Enter Values
Minimum 0
Minimum 0
How to use this calculator
- Enter the systolic and diastolic readings.
- Read the MAP.
How it works
MAP = diastolic + (systolic − diastolic) ÷ 3.
Worked example
120/80. MAP ≈ 93.3 mmHg.
Common mistakes
- Swapping systolic and diastolic.
- Treating one reading as definitive — blood pressure varies.
Frequently asked questions
What is a normal mean arterial pressure?
Roughly 70–100 mmHg for most adults; below 60 may not perfuse organs well, so seek medical advice.
How is MAP calculated?
MAP ≈ diastolic + ⅓ × (systolic − diastolic), because the heart spends about two-thirds of each cycle in diastole.
Is this medical advice?
No — it's an educational estimate. For any health concern, see a qualified clinician.
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Cite this tool
Zerdly. (2026). Mean Arterial Pressure Calculator. Retrieved from https://www.zerdly.com/tools/mean-arterial-pressure-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.