Free tool
CHA₂DS₂-VASc score calculator
Tally the CHA₂DS₂-VASc risk factors for the atrial-fibrillation stroke-risk score and the published annual-stroke-risk percentage from the original cohort. A risk calculator, not a treatment decision — and nothing you enter leaves your device.
CHA₂DS₂-VASc score worksheet — ____________
For a patient with non-valvular atrial fibrillation, tick each risk factor that is present and set age and sex. Prior stroke/TIA and age ≥ 75 score 2 points each; the rest score 1.
CHA₂DS₂-VASc total
0/ 9
Low risk descriptor
Published cohort risk for this score, not this patient's guaranteed risk.
Not a treatment decision
What guidelines do with this number is a separate, clinical decision. Guidelines have historically used thresholds around this score (for example, considering oral anticoagulation at higher scores), but that decision weighs stroke risk against bleeding risk (e.g. HAS-BLED) and individual patient factors, and rests with the treating physician against the current guideline. This tool does not recommend, start, or withhold any anticoagulant.
The score is under active revision: the 2024 ESC guidance moved toward CHA₂DS₂-VA, dropping the sex point. Verify against the current ESC/AHA/national guideline.
Stroke-risk calculator, not a treatment decision. CHA₂DS₂-VASc estimates published cohort stroke risk for a patient with non-valvular atrial fibrillation — it does not recommend, start, or withhold any anticoagulant. The score supports, not replaces, clinical assessment. The anticoagulation choice weighs stroke risk against bleeding risk (e.g. HAS-BLED) and individual patient factors and is a decision for the treating physician against the current guideline. Annual-risk percentages are from the original cohort (Lip et al.) — they are population estimates for this score, not this patient's guaranteed risk, and the high-score figures (6–9) come from small subgroups and are non-monotonic. Guidelines change: the score is under active revision (ESC 2024 moved toward CHA₂DS₂-VA, dropping the sex point) — verify against the current ESC/AHA/national guideline.
Privacy: Runs entirely in your browser — nothing you enter is sent to a server or stored.
Point values and the score-vs-annual-risk table reproduced from: MDCalc — CHA₂DS₂-VASc Score for Atrial Fibrillation Stroke Risk (criteria + point values).; Rohde LE, Saeed M, Barnes GD. Anticoagulation in Atrial Fibrillation (CHA₂DS₂-VASc score-vs-annual-risk table reproducing Lip et al.). StatPearls / NCBI Bookshelf NBK579414..
How the CHA₂DS₂-VASc score works
CHA₂DS₂-VASc adds seven risk factors — congestive heart failure, hypertension, age, diabetes, prior stroke/TIA, vascular disease, and sex — into a 0–9 score that maps to a published annual stroke risk for a patient with non-valvular atrial fibrillation. Two factors carry 2 points (age ≥75 and prior stroke/TIA — the subscript ‘2’s in the name). The score informs the anticoagulation conversation; it never makes the decision, which weighs stroke risk against bleeding risk and is the clinician's.
Many teams still tally the factors on a scrap of paper. If you run a cardiology clinic workflow on Avinya Plus, the same arithmetic can live on the note: build the seven factors into a cardiology template and total them with the formula engine, so the score sits beside the examination instead of on a calculator. The arithmetic is the engine's; the decision stays yours.
Frequently asked questions
- How is the CHA₂DS₂-VASc score calculated?
- Add one point each for congestive heart failure, hypertension, diabetes, vascular disease, and female sex, and for age 65–74; add two points for age 75 or older and for prior stroke, TIA, or thromboembolism. The maximum is 9.
- What stroke risk does each score correspond to?
- The tool shows the published adjusted annual stroke risk for each score from the original cohort (for example, 2.2% per year at a score of 2). These are population estimates for the score, not a guarantee for an individual, and the figures for scores 6–9 come from small subgroups.
- Does the score tell me whether to anticoagulate?
- No. It reports the score and the published risk only. The decision to start, withhold, or choose an anticoagulant weighs stroke risk against bleeding risk and individual factors, and rests with the treating physician against the current guideline.
- Is the score changing?
- Yes — the 2024 ESC guidance moved toward CHA₂DS₂-VA, dropping the sex point. Verify against the current ESC/AHA/national guideline.
- Does any of the data I enter leave my browser?
- No. The scoring runs entirely in your browser; nothing you enter is sent to a server or stored. The print option produces a clean worksheet you can save as a PDF.
Sources
- MDCalc — CHA₂DS₂-VASc Score for Atrial Fibrillation Stroke Risk (criteria + point values).
- Rohde LE, Saeed M, Barnes GD. Anticoagulation in Atrial Fibrillation (CHA₂DS₂-VASc score-vs-annual-risk table reproducing Lip et al.). StatPearls / NCBI Bookshelf NBK579414.
Point values and the score-vs-annual-stroke-risk table are reproduced from MDCalc and NCBI Bookshelf (NBK579414, reproducing Lip et al.). The percentages are population estimates for the score, not an individual prediction, and figures for scores 6–9 derive from small subgroups and are non-monotonic. The score is under active revision (ESC 2024 → CHA₂DS₂-VA). Reviewed against the sources on 2026-06-29.
Keep the risk score on the cardiology record.
In Avinya Plus you can build the CHA₂DS₂-VASc factors into a cardiology template, total them automatically, and keep the score on the note — the decision stays with you. See it on a quick demo.