Wells' Criteria for DVT
Pre-test probability of DVT.
RESULT
Wells' Criteria for DVT
What is Wells' Criteria for DVT?
Pre-test probability of DVT. Wells' Criteria for DVT is intended for use in: Adults.
How to Use the Wells' Criteria for DVT Calculator
- Enter Active cancer (treatment within 6 months or palliative).
- Enter Paralysis, paresis, or recent leg immobilization.
- Enter Bedridden ≥ 3 days or major surgery within 12 weeks.
- Enter Localized tenderness along the deep venous system.
- Enter Entire leg swollen.
- Enter Calf swelling > 3 cm vs. asymptomatic leg.
- Enter Pitting edema confined to symptomatic leg.
- Enter Collateral superficial veins (non-varicose).
- Enter Previously documented DVT.
- Enter Alternative diagnosis at least as likely as DVT.
- Click Calculate to see your result and interpretation.
Formula & Version
This calculator uses formula version 1.0, last reviewed September 2026.
References
- Wells PS et al., Lancet 1997;350:1795-1798
Frequently Asked Questions
What is Wells' Criteria for DVT?
Pre-test probability of DVT.
Who is Wells' Criteria for DVT intended for?
Adults. Always confirm applicability to your specific patient before use.
What formula or reference does Wells' Criteria for DVT use?
Wells PS et al., Lancet 1997;350:1795-1798
Is Wells' Criteria for DVT a diagnosis?
No. Wells' Criteria for DVT produces a score or estimate to support clinical decision-making — it is not a diagnosis and should be interpreted alongside full clinical judgement.
Medical Disclaimer: Medical calculators are provided for informational and educational purposes only. Results should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always verify results with a qualified healthcare professional.
