Wells Score DVT Calculator

How this calculator works

The Wells DVT score estimates pretest probability of deep vein thrombosis using clinical signs, risk factors, and alternative diagnosis likelihood.

Inputs used

• Clinical features
• Risk factors
• Alternative diagnosis likelihood

Clinical interpretation

Use the result with D-dimer and compression ultrasonography pathways according to local venous thromboembolism protocols.

Limitations and safety notes

Do not use in isolation when clinical suspicion is high, symptoms are severe, or the patient has special circumstances such as pregnancy or active anticoagulation.

References

• Wells PS, Anderson DR, Bormanis J, et al. Value of assessment of pretest probability of deep-vein thrombosis. Lancet. 1997.
• CHEST guideline and expert panel report on antithrombotic therapy for VTE disease.

Editorial review and citation methodology

Reviewed by the Quick Medical Calculator Editorial Team. Last reviewed: June 19, 2026. The review checks calculator inputs, intended population, interpretation, limitations, and source alignment.

• Prefer original validation studies for scoring systems and prediction tools.
• Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
• Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.