MAP Blood Pressure Calculator
MAP ≈ diastolic + (systolic − diastolic)/3. Click any i for detail.
Reading
Systolic (mmHg)
i
Systolic
The upper number (contraction). |
|
|---|---|
Diastolic (mmHg)
i
Diastolic
The lower number (relaxation). |
How to use this calculator
- Enter systolic and diastolic from a validated cuff.
- Read MAP and pulse pressure.
- Do not use this instead of emergency care or a clinician.
Results explained
MAP estimates the average pressure in an arterial cycle and weights diastole more because it lasts longer. Pulse pressure is systolic minus diastolic.
Quick reference: MAP
Clinicians interpret MAP in context (shock, ICP, meds) — a number alone is not a diagnosis.
| Item | Detail |
|---|---|
| Formula | DBP + (SBP−DBP)/3 |
| Equivalent | (SBP + 2×DBP)/3 |
| 120/80 example | MAP 93 mmHg |
| Pulse pressure | SBP − DBP |
Arterial-line MAP uses a different measurement method than a home cuff.
How the estimate is built
MAP = DBP + (SBP − DBP)/3.
Example scenario
120/80 → pulse pressure 40, MAP 93 mmHg.
FAQ
Is 93 “normal”?
120/80 is a common teaching example. Only your clinician interprets your numbers.
Irregular pulse?
Cuff MAP estimates are noisier with arrhythmia.
A1C or eGFR?
Different organ systems — see those calculators.