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Wells Criteria DVT Probability Score Calculator

Pretest probability of deep vein thrombosis.

Calculates the Wells DVT score to stratify risk: active cancer (+1), paralysis/plaster (+1), bed rest >3d (+1), along lower vein (+3), calf swelling >3 cm (+1), pitting oedema (+1), dilated veins (+1), prior DVT (+1), alternative diagnosis (−2).

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Wells score ≤0: Low, 1–2: Moderate, ≥3: High probability.

In depth

Calculates the Wells DVT score to stratify risk: active cancer (+1), paralysis/plaster (+1), bed rest >3d (+1), along lower vein (+3), calf swelling >3 cm (+1), pitting oedema (+1), dilated veins (+1), prior DVT (+1), alternative diagnosis (−2).