CHADS2 Score Calculator
Stroke risk stratification in non-valvular atrial fibrillation.
CHADS2 Criteria
Select all criteria that apply:
Important Note
CHA₂DS₂-VASc is now preferred over CHADS2 for more refined risk stratification, especially in identifying truly low-risk patients (CHA₂DS₂-VASc = 0).
CHADS2 Score
0/6
Annual Stroke Rate: 1.9%
Score
0/6
Stroke Rate
1.9%
Recommendation
Low risk. Aspirin or no therapy may be considered.
Annual Stroke Risk by Score
- Score 0: 1.9% per year
- Score 1: 2.8% per year
- Score 2: 4.0% per year
- Score 3: 5.9% per year
- Score 4: 8.5% per year
- Score 5: 12.5% per year
- Score 6: 18.2% per year
CHADS2 Mnemonic
- C - Congestive heart failure (+1)
- H - Hypertension (+1)
- A - Age ≥75 (+1)
- D - Diabetes (+1)
- S₂ - Stroke/TIA (+2)