Wells Score Calculator for Pulmonary Embolism

Written by Great Medico

Updated September 24, 2026 •2 min read

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Heart and vascular calculations often combine several measurements that are easy to misread in isolation. Wells Score Calculator for Pulmonary Embolism keeps those inputs together and shows the result the implemented model is designed to produce.

What this calculator does

Wells Score Calculator for Pulmonary Embolism uses Clinical signs of DVT, PE more likely than alternative diagnosis, Heart rate >100 bpm, Immobilization ≥3 days or surgery in previous 4 weeks, Previous DVT/PE, Hemoptysis, and Malignancy to calculate Wells PE score. It is built around the exact fields displayed in this plugin rather than a generic version of the topic. Cardiovascular formulas are sensitive to measurement technique and clinical context. A mathematically correct output can still be misleading if the input was obtained under a different physiologic condition, with a different assay, or outside the population for which the score was developed.

How to use it

Complete the requested fields, including Clinical signs of DVT, PE more likely than alternative diagnosis, Heart rate >100 bpm, Immobilization ≥3 days or surgery in previous 4 weeks, Previous DVT/PE, and Hemoptysis, then finish the remaining items shown in the calculator. Confirm that each yes/no, category, date, or score option is applied exactly as labeled. When the formula combines measurements, use values obtained under the same assessment or physiologic conditions whenever possible.

How the calculation works

The Wells PE score is the sum of the embedded points for signs of DVT, PE judged more likely than another diagnosis, heart rate at least 100, recent immobilization/surgery, previous VTE, hemoptysis, and malignancy. This calculator uses the two-tier interpretation: a score above 4 is “PE likely,” while 4 or below is “PE unlikely.”

Example

Using the sample values prefilled in this calculator, the primary result is 0 points (PE unlikely (two-tier)). This worked example shows how the plugin’s own default inputs flow through the implemented method; replace them with the correct patient, laboratory, imaging, or personal values before interpreting a result.

How to interpret the result

A score above 4 is labeled PE likely in the two-tier system; 4 or below is PE unlikely. The result changes the next diagnostic step rather than confirming or excluding PE by itself.

Limitations and notes

Wells is a pretest-probability tool and should feed into an evidence-based diagnostic pathway involving D-dimer and/or imaging as appropriate. One item—whether PE is more likely than an alternative diagnosis—is subjective, and pregnancy, anticoagulation, age, and other contexts may require a different pathway.