MAP Biology & Medicine Tool

Mean Arterial Pressure

Estimate mean arterial pressure from systolic and diastolic pressure. This page combines the live calculator with the underlying formula or method, a worked example and practical study notes.

Study Tools / Biology & Medicine / Mean Arterial Pressure
Clinical note: The displayed MAP relationship is an approximation. It does not replace direct arterial waveform analysis and may be less accurate outside the assumptions of the formula.
Clinical calculator
Calculate Mean Arterial Pressure

What Is the Mean Arterial Pressure?

Estimate mean arterial pressure from systolic and diastolic pressure. The calculator is paired with the governing relationship so the numerical output stays connected to the concept you are studying.

Use this page to check worked examples, compare different inputs, and keep the meaning of each variable visible while practising.

Formula or Method

Formula / method
MAP ≈ (SBP + 2×DBP)/3

The common resting approximation weights diastolic pressure more heavily because the heart spends more of the cycle in diastole. It is an estimate, not a direct arterial waveform measurement. Keep units and conventions consistent with the problem statement and with the options shown in the calculator.

How to Use the Calculator

  1. Read the input labels and enter the values requested by the problem or exercise.
  2. Check units, signs, angle mode, population/sample options, or other settings before calculating.
  3. Compare the result with the displayed formula or method and the worked example below.

Worked Example

Example: For 120/80 mmHg, MAP≈93.3 mmHg.

Common Mistakes

Why It Matters for Students

The Mean Arterial Pressure is useful when a physiology or molecular/quantitative relationship needs a fast numerical check. Keep the input definitions and units visible while studying so the calculation remains tied to the underlying concept.

The displayed MAP relationship is an approximation. It does not replace direct arterial waveform analysis and may be less accurate outside the assumptions of the formula.

Related NexaMed Study Tools

These pages are part of the same Study Tools system. For the complete collection, open the 2,420-tool NexaMed Study Tools hub.

Frequently Asked Questions

What is the mean arterial pressure used for?
The Mean Arterial Pressure applies the relationship shown on this page to the inputs you provide. It is intended as a practical study and reference tool. The page is designed for educational/reference use and shows the assumptions behind the calculation.
What formula does the mean arterial pressure use?
The common resting approximation weights diastolic pressure more heavily because the heart spends more of the cycle in diastole. It is an estimate, not a direct arterial waveform measurement.
How do I use the mean arterial pressure?
Enter the requested values, check the units or options, and calculate. Then compare the result with the formula, worked example and notes on the page. The page is designed for educational/reference use and shows the assumptions behind the calculation.
Calculation source: This page uses the NexaMed Prep Study Tools engine and the same tool definition used by the main interactive hub. Formula descriptions are presented for educational reference; follow the conventions, units and assumptions required by your course, textbook or examination.