Emergency medicine · Pretest probability
Wells Score for Pulmonary Embolism
Apply the two-tier Wells framework to a patient in whom pulmonary embolism is clinically suspected.
Patient factors
Select one answer per row
Private by design. Values are calculated on this device and are not saved or sent to analytics.
Result
Complete all factors
The score and its interpretation band will appear here.
Evidence packet
What this tool is based on
This versioned record keeps the citations, equation or decision rule, units, test coverage, intended population, and exclusions attached to the tool.
How evidence review works →Clinically assessed patients with suspected pulmonary embolism in a validated diagnostic pathway.
Seven-item Wells PE score with the two-tier threshold: PE unlikely ≤4; PE likely >4.
Categorical weighted point score only.
Half-point arithmetic, every factor, incomplete state, maximum score, and >4 two-tier boundary.
Do not skip
Limitations and exclusions
- Does not diagnose or exclude PE.
- The 'PE more likely' item requires clinician judgment and cannot be inferred automatically.
- Do not mix two-tier and three-tier interpretation schemes.
- Pregnancy, pediatric patients, anticoagulated patients, and population-specific pathways may require different approaches.
One clearly labeled, contextually relevant sponsor may support this reference area. Sponsorship will never interrupt inputs, obscure results, influence formulas, or imply clinical endorsement.
About this tool
Wells Score for Pulmonary Embolism Calculator
Use this Wells PE calculator to total the published clinical criteria used in pulmonary-embolism pretest probability assessment.
The result belongs inside a validated diagnostic pathway and does not diagnose or exclude pulmonary embolism by itself. Apply the scoring model and local pathway consistently.