Free tool
Mean arterial pressure (MAP) calculator
Enter systolic and diastolic blood pressure for the mean arterial pressure (MAP = DBP + (SBP − DBP)/3) and the pulse pressure, with the cited ≥60 mmHg perfusion and ≥65 mmHg sepsis-target reference points. A bedside arithmetic aid, not a diagnosis — and nothing you enter leaves your device.
Cuff (non-invasive) blood pressure. The formula is an estimate that loses accuracy at high heart rate, in arrhythmia, and at physiologic extremes; an arterial line gives the true MAP.
MAP = DBP + (SBP − DBP) / 3
Literature reference points
Perfusion floor
≥ 60 mmHg
Surviving Sepsis target
≥ 65 mmHg
Widely-cited normal
70–100 mmHg
These are cited literature reference points, not a verdict on this patient and not a target instruction. The ≥65 mmHg figure is the Surviving Sepsis Campaign initial target; the ≥60 mmHg figure is the commonly-cited organ-perfusion floor. Targets are individualised and guideline-dependent — they are decided by the treating clinician. Source: StatPearls, NBK538226.
A bedside arithmetic aid, not a diagnosis. This computes the standard published MAP formula (MAP = DBP + (SBP − DBP)/3) from the blood pressure you measured. It does not interpret a patient, recommend a target, or prescribe anything. The ≥60 mmHg perfusion figure and the ≥65 mmHg Surviving Sepsis target are cited literature reference points, not patient-specific instructions — targets are individualised and guideline-dependent. The cuff formula is an estimate that loses accuracy at high heart rates, arrhythmia, and physiologic extremes; an arterial line gives the true MAP. Not a medical device; no certification claimed. Verify against the current Surviving Sepsis / national guideline and your own clinical judgement.
Privacy: Runs entirely in your browser — nothing you enter is sent to a server or stored.
The MAP formula and the reference points are reproduced from: DeMers D, Wachs D. Physiology, Mean Arterial Pressure. StatPearls / NCBI Bookshelf NBK538226..
How mean arterial pressure works
Mean arterial pressure approximates the average pressure perfusing the organs across a cardiac cycle: MAP = diastolic + (systolic − diastolic)/3. A MAP of at least 60 mmHg is the figure usually cited as the floor for vital-organ perfusion, and ≥65 mmHg is the Surviving Sepsis Campaign target — both reference points, not patient-specific targets. This is the same MAP the Avinya Plus EMR fills into the vitals row the moment a nurse enters a blood pressure.
In a clinic running on Avinya Plus, the same arithmetic never has to be re-keyed: the patient records & vitals in the EMR compute the MAP automatically for every blood pressure recorded, so the number sits beside the reading instead of on a calculator. The arithmetic is the platform's; the interpretation stays yours.
Frequently asked questions
- How is mean arterial pressure calculated?
- MAP = diastolic + (systolic − diastolic) ÷ 3, which is the same as (systolic + 2 × diastolic) ÷ 3. The tool also shows the pulse pressure (systolic − diastolic).
- What is a normal MAP?
- Around 70–100 mmHg is widely cited as a reference range, but the sourced literature anchors on a ≥60 mmHg organ-perfusion floor and a ≥65 mmHg Surviving Sepsis target. These are reference points, not a diagnosis or an individual target.
- How accurate is the cuff-based MAP?
- It is an estimate. The formula loses accuracy at high heart rates, in arrhythmia, and at physiologic extremes; an arterial line gives the true MAP.
- Does the tool set a blood-pressure target?
- No. It computes the number only. Targets are individualised and guideline-dependent and are decided by the treating clinician.
- Does any of the data I enter leave my browser?
- No. The calculation runs entirely in your browser; nothing you enter is sent to a server or stored. The print option produces a clean worksheet you can save as a PDF.
Sources
The MAP formula and the ≥60 mmHg perfusion / ≥65 mmHg Surviving Sepsis reference points are reproduced from StatPearls (NBK538226). This calculator mirrors the MAP the Avinya Plus EMR computes automatically for every vitals entry. Reviewed against the source on 2026-06-29.
MAP, computed on every visit — automatically.
In Avinya Plus the EMR computes MAP for every vitals entry the moment a blood pressure is recorded, and flags out-of-range values against age bands — no calculator, no re-keying. See it on a quick demo.