HAS-BLED Bleeding Risk

Estimates 1-year major bleeding risk on anticoagulation — used alongside CHA₂DS₂-VASc.

✓ Reviewed by Dr. Poonam Sekhon Chahal · 28 May 2026
Designed for healthcare professionals or trained caregivers — not for self-diagnosis. If you have symptoms, seek medical care.

How this is calculated

One point each for hypertension, abnormal renal and/or liver function, stroke, bleeding history, labile INR, elderly (>65), and drugs and/or alcohol — summed 0–9.

Sources

  1. Pisters R, Lane DA, Nieuwlaat R, de Vos CB, Crijns HJ, Lip GY. A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in AF. Chest 2010.
This calculator is for educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. The result is based on standard clinical formulas applied to the values you entered — your individual situation may need adjustments your doctor can make. Never disregard professional medical advice or delay seeking it because of something you read or calculated on healthcalculus.