CHA₂DS₂-VASc Score

Estimates stroke risk to guide anticoagulation discussions.

Stroke risk in atrial fibrillation

Patient parameters

Adjust values, then click Calculate.

Congestive heart failure

Hypertension

Diabetes mellitus

Prior stroke/TIA/thromboembolism

Vascular disease

Age

0–120

Sex

Results

CHA₂DS₂-VASc score: 0 points

What this calculator does

CHA₂DS₂-VASc estimates annual stroke risk in non-valvular atrial fibrillation to guide anticoagulation discussions. Each comorbidity adds weighted points.

Formula and variables

Displayed formula: Stroke risk in atrial fibrillation

The engine evaluates: CHA₂DS₂-VASc score (points). Variable names match the input field keys so you can trace each step from entry to output.

How to use this tool

1. Open the CHA₂DS₂-VASc Score and enter your values using the units shown beside each field.
2. Review that inputs are within the typical physiological range before you calculate.
3. Read the result together with the interpretation notes below and your local clinical context.

How to interpret the result

Scores ≥2 in men or ≥3 in women historically favor anticoagulation unless bleeding risk outweighs benefit. Shared decision-making with HAS-BLED and patient preferences is essential.

Clinical context

Cardiovascular calculations support assessment but never replace ECG, imaging, troponin trends, or emergent reperfusion pathways when STEMI is suspected.

Limitations and disclaimer

This tool supports education and clinical triage only. It does not replace professional medical advice, diagnosis, or treatment. Reference ranges vary by laboratory, age, pregnancy status, and comorbidity. Always confirm critical decisions with institutional protocols and qualified clinicians.