CHADS2 Score – AF Stroke Risk (Original)

Calculates the original CHADS2 score for atrial fibrillation stroke risk. Assigns 1 point each for Congestive heart failure, Hypertension, Age ≥75, Diabetes mellitus, and 2 points for prior Stroke/TIA. Score 0 = low risk; 1 = intermediate; ≥2 = high risk requiring anticoagulation.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How to Use

Enter the values for the scenario you are assessing. Calculates the original CHADS2 score for atrial fibrillation stroke risk. Assigns 1 point each for Congestive heart failure, Hypertension, Age ≥75, Diabetes mellitus, and 2 points for prior Stroke/TIA. Score 0 = low risk; 1 = intermediate; ≥2 = high risk requiring anticoagulation. Use the chads2 score result to inform your calculation.

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