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Wells DVT Score Calculator

9-item DVT pretest probability.

Compute the Wells score for deep vein thrombosis (DVT) — a 9-item pretest probability score where +1 is added per positive item and 2 is subtracted if an alternative diagnosis is at least as likely. ≤ 0 unlikely; ≥ 2 likely.

Priya Venkatesan By Priya Venkatesan
Reviewed by Dr. Helena Ortiz
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

Total = active_cancer + paralysis + bedridden + tenderness + leg_swollen + calf_diff + pitting_edema + collateral_veins + prior_dvt − 2·alt_dx.

In depth

Compute the Wells score for deep vein thrombosis (DVT) — a 9-item pretest probability score where +1 is added per positive item and 2 is subtracted if an alternative diagnosis is at least as likely. ≤ 0 unlikely; ≥ 2 likely.