CHA„₂DS₂-VASc Calculator

Estimate the annual stroke risk for someone with atrial fibrillation using the CHA„DS₂-VASc score — the tool that guides anticoagulation decisions.

Congestive heart failure (C) CHF / LV dysfunction — 1 point

Hypertension (H) Blood pressure ≥140/90 or treated — 1 point

Age (A)

Diabetes (D) Diabetes mellitus — 1 point

Stroke / TIA / thromboembolism (S) Prior stroke, TIA or embolism — 2 points

Vascular disease (V) Prior MI, PAD or aortic plaque — 1 point

Sex category (Sc) Female sex (adds risk, not benefit) — 1 point

Who is this for?
Adults with non-valvular atrial fibrillation. The score helps doctors weigh stroke risk against bleeding risk when deciding about blood thinners.

🩹 1-year risk estimate

Adjusted stroke risk per score point.

💊 Anticoagulation guidance

Standard thresholds for treatment talks.

📊 9-point scale

Each factor weighted by stroke impact.

📖 Educational only

Always confirm with your cardiologist.