AFib Stroke Risk (CHA₂DS₂-VASc) Calculator
Score stroke risk for people with atrial fibrillation.
Your result
This score is used to discuss anticoagulation with a clinician in people with atrial fibrillation. Do not start or stop blood thinners based on this number alone.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
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Frequently asked questions
What does the AFib Stroke Risk (CHA₂DS₂-VASc) Calculator do?
Score stroke risk for people with atrial fibrillation. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: afib stroke risk score; cha2ds2 vasc; atrial fibrillation blood thinner decision.