CHA2DS2
CHA2DS2: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.
CHA2DS2
Congestive heart failure (1 = yes)
Hypertension (1 = yes)
Age ≥ 75 years (1 = yes)
Diabetes mellitus (1 = yes)
Prior stroke or TIA (1 = yes)
CHADS₂ score
1
Annual stroke risk without anticoagulation
2.8%
Risk
Moderate
More about: CHA2DS2
What it calculates
The “CHA2DS2” calculator computes CHADS₂ score from 5 parameters: congestive heart failure (1 = yes), hypertension (1 = yes), age ≥ 75 years (1 = yes), diabetes mellitus (1 = yes), prior stroke or tia (1 = yes).
Used by professionals and patients to assess health metrics, dosages, and risks.
Example calculation
With parameters Congestive heart failure (1 = yes) = 0, Hypertension (1 = yes) = 1, Age ≥ 75 years (1 = yes) = 0, Diabetes mellitus (1 = yes) = 0, Prior stroke or TIA (1 = yes) = 0 the result is 1 (Current guidelines use CHA₂DS₂-VASc / CHA₂DS₂-VA).
How to use
- Enter congestive heart failure (1 = yes), hypertension (1 = yes), age ≥ 75 years (1 = yes), diabetes mellitus (1 = yes) and prior stroke or tia (1 = yes) — each field above is adjustable with a slider.
- CHADS₂ score is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.
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