CHA₂DS₂-VASc Calculator
Evaluate the stroke risk in patients suffering from Atrial Fibrillation (AFib). Instantly calculate your score to help guide decisions on anticoagulant therapy.
Last updated: March 3, 2026
Medical Disclaimer
This tool is for informational purposes only. Do not stop or start taking blood thinners based on this score alone. Always consult with your doctor or cardiologist.
Heart failure signs/symptoms or reduced ejection fraction (+1 point)
Resting BP >140/90 mmHg or on anti-hypertensive drugs (+1 point)
Fasting glucose >125 mg/dL or treated with insulin/drugs (+1 point)
Prior history of Stroke, Transient Ischemic Attack, or Thromboembolism
Prior myocardial infarction, peripheral artery disease, aortic plaque (+1 point)
Low Risk
No antithrombotic therapy is strictly required, but clinical discretion applies.
Disclaimer: This tool is for educational and informational purposes only and does not constitute medical advice. Treatment decisions regarding anticoagulation must carefully weigh bleeding risk (e.g., using HAS-BLED score) and be made by a qualified healthcare professional.
Understanding Your Score
The total score guides physicians in balancing the risk of a life-threatening stroke against the risk of severe bleeding caused by medications.
Low Risk
Patients are generally considered at very low risk for stroke. In most cases, the minor stroke risk does not outweigh the bleeding risk of anticoagulants.
Moderate Risk
A 'gray area' where treatment decisions are highly individualized. Doctors will discuss patient preferences, access to care, and individual bleeding risks.
High Risk
Guidelines strongly recommend the use of oral anticoagulants (like DOACs or Warfarin) to actively prevent the high likelihood of stroke.
Frequently Asked Questions
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A quick and validated way for clinicians and students to calculate AFib risk.
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