Wells Criteria for PE Calculator
Calculate the Wells criteria for pulmonary embolism with both two-tier and three-tier interpretation, including Wells score interpretation and guideline-based diagnostic context.
Last updated on: April 1, 2026
Calculate Wells Criteria for PE
Wells Score Interpretation
The Wells criteria for pulmonary embolism is a pretest probability score used to estimate how likely acute PE is before definitive imaging. It is one of the most widely used PE probability tools in clinical practice.
A Wells score calculator is useful because it supports structured decision-making, helps determine whether PE is likely or unlikely, and informs when D-dimer, PERC, or imaging may be appropriate.
Probability Categories
Wells Score Guidelines Context
Current PE diagnostic pathways commonly begin with a validated pretest probability tool such as Wells criteria for PE or the revised Geneva score.
In non-high pretest probability patients, D-dimer testing is commonly used to exclude PE, while some pathways also use PERC in selected low-risk patients.
Practical Clinical Workflow
A Wells score interpretation is most useful when it helps structure the next step: low-probability patients may undergo D-dimer testing or PERC assessment, while PE likely patients more often proceed toward imaging depending on the clinical scenario.
The Wells criteria for pulmonary embolism should not replace clinical judgment, but it remains one of the most practical and widely recognized tools for PE probability assessment.
This page has been medically reviewed by Dr. Khoulah Attia – PharmD, Immunology Specialist.