Goal
Calculate the documented CHA₂DS₂-VASc stroke-risk score with visible age, prior-stroke, vascular-disease, and sex-category points.
CHA₂DS₂-VASc Score Calculator
Calculate the documented CHA₂DS₂-VASc stroke-risk score with visible age, prior-stroke, vascular-disease, and sex-category points.
Key facts
- What it does
- Calculate the documented CHA₂DS₂-VASc stroke-risk score with visible age, prior-stroke, vascular-disease, and sex-category points.
- Formula
CHA₂DS₂-VASc = heart failure/dysfunction (1) + hypertension (1) + age ≥75 (2) or age 65–74 (1) + diabetes (1) + prior stroke/TIA/thromboembolism (2) + vascular disease (1) + female sex category (1). Maximum 9 points.- You enter
- Age · Sex category used by the score · Heart failure or left-ventricular dysfunction documented · Hypertension documented · Diabetes mellitus documented · Previous stroke, TIA, or thromboembolism · Vascular disease documented
- Worked example
- CHA₂DS₂-VASc = 0 points for the supplied example inputs.
A clearer path to an answer
From your question to a useful result
This page keeps the calculation transparent: define the goal, enter the matching values, inspect the method, and decide what the result means in your situation.
Inputs
Age · Sex category used by the score · Heart failure or left-ventricular dysfunction documented · Hypertension documented · Diabetes mellitus documented · Previous stroke, TIA, or thromboembolism · Vascular disease documented
Method
CHA₂DS₂-VASc = heart failure/dysfunction (1) + hypertension (1) + age ≥75 (2) or age 65–74 (1) + diabetes (1) + prior stroke/TIA/thromboembolism (2) + vascular disease (1) + female sex category (1). Maximum 9 points.
Next step
Calculate, review the assumptions below, then compare a related tool when the decision needs more context.
CHA₂DS₂-VASc Score Calculator
Calculate the documented CHA₂DS₂-VASc stroke-risk score with visible age, prior-stroke, vascular-disease, and sex-category points.
Open the CHA₂DS₂-VASc Score Calculator pageMore health tools
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Result
Enter your values above and choose Calculate to see the result here.
Calculation map
Follow the path from input to answer
01
Inputs (7)
- Age Ready
- Sex category used by the score Ready
- Heart failure or left-ventricular dysfunction documented Ready
- Hypertension documented Ready
- +3 more inputs
02
Formula
CHA₂DS₂-VASc = heart failure/dysfunction (1) + hypertension (1) + age ≥75 (2) or age 65–74 (1) + diabetes (1) + prior stroke/TIA/thromboembolism (2) + vascular disease (1) + female sex category (1). Maximum 9 points.
Bounded, transparent calculation
03
Result
- Calculate to preview the result.
Recent runs
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Formula, assumptions, and example
Formula: CHA₂DS₂-VASc = heart failure/dysfunction (1) + hypertension (1) + age ≥75 (2) or age 65–74 (1) + diabetes (1) + prior stroke/TIA/thromboembolism (2) + vascular disease (1) + female sex category (1). Maximum 9 points.
The calculator adds the components of the CHA₂DS₂-VASc scheme and keeps the age, stroke-history, and sex-category contributions explicit. It is a risk-stratification worksheet commonly used in atrial-fibrillation care, not a diagnosis or treatment order.
- The score is being considered in the clinical population and indication for which the chosen version is appropriate, commonly atrial fibrillation.
- Age contributes two points at 75 years or older, one point at 65–74, and zero below 65.
- A previous stroke, TIA, or systemic thromboembolism contributes two points.
- The vascular-disease component follows the documented clinical definition used by the local pathway.
- Female sex category is displayed as a score component; its meaning is interpreted with the rest of the risk profile and current guidance.
- The score does not diagnose atrial fibrillation, heart failure, hypertension, diabetes, stroke, or vascular disease.
- The result does not calculate an exact personal annual risk and does not select anticoagulant, antiplatelet, or dose.
- A clinician must reconcile the score with bleeding risk, comorbidities, preferences, contraindications, and current guidance before treatment decisions.
Worked example: CHA₂DS₂-VASc = 0 points for the supplied example inputs.
Displayed input contract
- Age · minimum 18 · maximum 120
- Sex category used by the score · 2 choices
- Heart failure or left-ventricular dysfunction documented · 2 choices
- Hypertension documented · 2 choices
- Diabetes mellitus documented · 2 choices
- Previous stroke, TIA, or thromboembolism · 2 choices
- Vascular disease documented · 2 choices
The displayed limits are checked before the handler runs. Model-specific domain checks may also reject impossible or non-finite inputs.
Methodology: This calculator follows the WorldCalculate input, formula, precision, and boundary policy. Read the official methodology.
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Answer-first guide
How to use the CHA₂DS₂-VASc Score Calculator for a real question
Calculate the documented CHA₂DS₂-VASc stroke-risk score with visible age, prior-stroke, vascular-disease, and sex-category points. Start with one clearly defined goal, enter values in the units shown, and keep the result attached to the assumptions below.
What this answers
This tool is useful when your question includes CHA2DS2-VASc calculator, atrial fibrillation stroke score, CHA2DS2 VASc score. It returns the outputs declared in the calculator contract rather than a live quote, approval, diagnosis, or professional sign-off.
What you enter
Age · Sex category used by the score · Heart failure or left-ventricular dysfunction documented · Hypertension documented · Diabetes mellitus documented · Previous stroke, TIA, or thromboembolism · Vascular disease documented. Keep the same time period, unit system, and currency wherever the form requires comparable values.
How to check it
Run the worked example first, compare its output with the page's example, then change one input at a time. This makes an unexpected result easier to trace to a unit, boundary, or assumption.
Three checks before you rely on the answer
- Match the question. Confirm that the result means the quantity you need, not a similar-sounding percentage, balance, rate, or estimate.
- Match the inputs. Use the requested units and period, and read each hint before replacing the example values with your own.
- Read the boundary. Review the assumptions and limits. The score is being considered in the clinical population and indication for which the chosen version is appropriate, commonly atrial fibrillation.
Need a wider view? Browse Health Calculators or compare the related tools below. The WorldCalculate methodology explains how formulas, examples, limits, and revisions are reviewed.
How to use the CHA₂DS₂-VASc Score Calculator
- Enter Age (years).
- Enter Sex category used by the score.
- Enter Heart failure or left-ventricular dysfunction documented.
- Enter Hypertension documented.
- Enter Diabetes mellitus documented.
- Enter Previous stroke, TIA, or thromboembolism.
- Enter Vascular disease documented.
- Choose Calculate and read the result panel.
- Use Download PDF or Download Word to save a result sheet.
Formula
CHA₂DS₂-VASc = heart failure/dysfunction (1) + hypertension (1) + age ≥75 (2) or age 65–74 (1) + diabetes (1) + prior stroke/TIA/thromboembolism (2) + vascular disease (1) + female sex category (1). Maximum 9 points.
The calculator adds the components of the CHA₂DS₂-VASc scheme and keeps the age, stroke-history, and sex-category contributions explicit. It is a risk-stratification worksheet commonly used in atrial-fibrillation care, not a diagnosis or treatment order.
Worked example
CHA₂DS₂-VASc = 0 points for the supplied example inputs.
Assumptions and limits
- The score is being considered in the clinical population and indication for which the chosen version is appropriate, commonly atrial fibrillation.
- Age contributes two points at 75 years or older, one point at 65–74, and zero below 65.
- A previous stroke, TIA, or systemic thromboembolism contributes two points.
- The vascular-disease component follows the documented clinical definition used by the local pathway.
- Female sex category is displayed as a score component; its meaning is interpreted with the rest of the risk profile and current guidance.
- The score does not diagnose atrial fibrillation, heart failure, hypertension, diabetes, stroke, or vascular disease.
- The result does not calculate an exact personal annual risk and does not select anticoagulant, antiplatelet, or dose.
- A clinician must reconcile the score with bleeding risk, comorbidities, preferences, contraindications, and current guidance before treatment decisions.
Who uses this calculator?
- Students learning the CHA₂DS₂-VASc point structure
- Clinicians checking a documented risk-score total
- Readers comparing age and prior-stroke contributions in AF care
When is it useful?
- Add the seven documented score components transparently.
- Show why age bands and previous stroke carry different weights.
- Keep a risk score separate from an anticoagulation decision.
Context and background
How health estimates should be read
Health calculators use measurements and population-level relationships to produce screening or planning estimates. They describe the supplied model; they do not diagnose, prescribe, or replace clinical judgment.
Many familiar health formulas began as practical ways to summarize measurements. Their limits matter as much as their output because individual bodies, medications, conditions, and professional standards vary.
Research and review
How this guide was researched
Researched by Hassan ALRowaie, Founder and editorial researcher at WorldCalculate.
This guide follows the live calculator's declared inputs, formula, worked example, assumptions, validation boundaries, and source-backed methodology. The review date describes editorial review of the calculator explanation; it is not a promise that external facts or rates remain current.
CHA₂DS₂-VASc is a structured score used to describe thromboembolic risk factors in appropriate atrial-fibrillation pathways. WorldCalculate makes every point visible and stops at the arithmetic so a score is not mistaken for a diagnosis or an automatic anticoagulation decision.
What the score represents
The acronym names heart failure or dysfunction, hypertension, age, diabetes, previous stroke or embolism, vascular disease, and sex category.
Different components have different weights, which is why a simple checklist can be easier to audit than a remembered total.
How age contributes
Age is not a single yes-or-no item. The displayed scheme awards two points at 75 years or older, one point from 65 through 74, and none below 65.
The page shows age points independently so a boundary change can be checked without re-adding every other item.
Why prior stroke is weighted twice
A previous stroke, transient ischemic attack, or thromboembolism contributes two points in the score structure.
Whether an event meets the clinical definition belongs to the medical record and the responsible professional, not an online guess.
Worked example
A 55-year-old man with none of the listed documented conditions receives zero points in this arithmetic example.
Adding hypertension would add one point; adding a prior stroke or thromboembolism would add two. Those examples demonstrate weights, not treatment thresholds.
Use in atrial fibrillation pathways
The score is commonly discussed in relation to atrial fibrillation, but the context, guideline, and patient group matter. A score should not be applied to an undiagnosed rhythm or to another condition without a validated reason.
Confirm the rhythm diagnosis and the pathway before interpreting the number.
The score is not an annual guarantee
A risk score summarizes population-derived factors; it cannot predict exactly what will happen to one person. Studies, calibration, age, treatment, and population can change observed event rates.
Use the total as one piece of shared clinical reasoning rather than a promise or a guarantee.
Do not self-start or stop treatment
Anticoagulation decisions also involve bleeding risk, kidney and liver function, interactions, adherence, procedures, pregnancy considerations, and patient preferences.
Never start, stop, or change an anticoagulant based only on an online score.
Documentation and reassessment
Record the source of each component, the date, the rhythm context, and any uncertainty. Scores can change as age and medical history change.
A clinician may use a different version or a current guideline update, so the result should remain traceable to its convention.
FAQs
Does this diagnose AF? No. Is female sex alone the same as a treatment decision? No. Does a high score prescribe a specific medicine? No; current clinical guidance and individualized review are required.
Frequently asked questions
What is the CHA₂DS₂-VASc Score Calculator?
Calculate the documented CHA₂DS₂-VASc stroke-risk score with visible age, prior-stroke, vascular-disease, and sex-category points.
What is the formula for the CHA₂DS₂-VASc Score Calculator?
CHA₂DS₂-VASc = heart failure/dysfunction (1) + hypertension (1) + age ≥75 (2) or age 65–74 (1) + diabetes (1) + prior stroke/TIA/thromboembolism (2) + vascular disease (1) + female sex category (1). Maximum 9 points. The calculator adds the components of the CHA₂DS₂-VASc scheme and keeps the age, stroke-history, and sex-category contributions explicit. It is a risk-stratification worksheet commonly used in atrial-fibrillation care, not a diagnosis or treatment order.
What do I need to use this calculator?
Enter Age, Sex category used by the score, Heart failure or left-ventricular dysfunction documented, Hypertension documented, Diabetes mellitus documented, Previous stroke, TIA, or thromboembolism, Vascular disease documented, then choose Calculate.
What are the limits of this calculator?
The score is being considered in the clinical population and indication for which the chosen version is appropriate, commonly atrial fibrillation. Age contributes two points at 75 years or older, one point at 65–74, and zero below 65. A previous stroke, TIA, or systemic thromboembolism contributes two points. The vascular-disease component follows the documented clinical definition used by the local pathway. Female sex category is displayed as a score component; its meaning is interpreted with the rest of the risk profile and current guidance. The score does not diagnose atrial fibrillation, heart failure, hypertension, diabetes, stroke, or vascular disease. The result does not calculate an exact personal annual risk and does not select anticoagulant, antiplatelet, or dose. A clinician must reconcile the score with bleeding risk, comorbidities, preferences, contraindications, and current guidance before treatment decisions.
Methodology
This calculator is part of the WorldCalculate library. Its formula, example, assumptions, input bounds, and output formatting follow the official methodology.
Use this calculator as part of a bigger plan
These WorldCalculate collections connect this tool with related questions while keeping each calculation separate and transparent.