About PreventCalculator

About PreventCalculator.com

PreventCalculator.com provides free, clinically-grounded cardiovascular risk calculators based on the American Heart Association's 2023 PREVENT equations and the ACC/AHA Pooled Cohort Equations. Our goal is to make validated cardiovascular risk assessment accessible to both healthcare professionals and the general public.

All calculators on this site are built on peer-reviewed, published equations and are intended for educational use. They are not a substitute for clinical judgment or professional medical advice.

Who Writes and Reviews This Content

PreventCalculator.com is maintained by the PreventCalculator Editorial Team, a small group focused on one task: implementing published, peer-reviewed cardiovascular risk equations accurately and explaining them clearly. We are not a hospital, clinic, or medical practice, and nothing on this site is written or reviewed as personalized medical advice.

Here is exactly how we work, so you know what you are getting:

We are not affiliated with the American Heart Association, the American College of Cardiology, or any hospital system, and we say so clearly throughout the site. If you want clinical interpretation of your results, the right next step is always a conversation with a doctor or nurse who knows your full health history — these calculators are a starting point for that conversation, not a replacement for it.

Questions about a specific calculator, a citation, or something that looks wrong? Email us directly at hello@preventcalculator.com — we read and respond to every message.

What is the PREVENT Calculator?

The PREVENT™ (Predicting Risk of Cardiovascular Disease EVENTs) calculator was introduced by the American Heart Association in 2023. It represents a major advance over previous tools by:

• Including heart failure as an outcome alongside heart attack and stroke
• Incorporating kidney function (eGFR) as a required input
• Adding BMI to reflect metabolic health
• Estimating both 10-year and 30-year cardiovascular risk
• Removing race as a biological variable, improving equity
• Being validated on 6.5+ million diverse U.S. adults

Reference: Khan SS et al. Novel Prediction Equations for Absolute Risk Assessment of Total Cardiovascular Disease Incorporating Cardiovascular-Kidney-Metabolic Health. Circulation. 2023;148(24):1982–2004.

All Cardiovascular Risk Calculators

PreventCalculator.com hosts a full suite of validated cardiovascular risk tools. Whether you are a patient checking your long-term heart risk or a clinician triaging chest pain in the ED, there is a calculator here built for your clinical question.

Long-Term CVD Risk — Primary Prevention

These calculators answer the question: "What is this patient's risk of a heart attack, stroke, or heart failure over the next 10–30 years?" They are designed for stable outpatients without existing cardiovascular disease.

Heart Attack & Cardiac Risk

These tools focus specifically on myocardial infarction risk and general cardiac risk scoring, incorporating additional inputs like family history and lifestyle factors.

Emergency & Acute Chest Pain

Unlike long-term prevention tools, the HEART Score is used in the Emergency Department to answer a completely different question: "Does this chest pain patient need to be admitted right now?" It is validated for acute triage, not long-term prevention.

Regional & Specialty Calculators

These tools serve specific populations or clinical questions. The Framingham calculator is the standard of care in Canadian primary care. The MESA calculator adds coronary artery calcium scoring for patients in the borderline risk zone. The eGFR calculator helps you find your kidney function score — a required input for the PREVENT calculator.

Which Calculator Should I Use?

The right calculator depends entirely on the clinical question:

• Stable outpatient, no known CVD, aged 30–79? → Use the AHA PREVENT Calculator. It is the most current and comprehensive tool for primary prevention.
• Want the older ACC/AHA tool? → Use the ASCVD Risk Calculator based on the 2013 Pooled Cohort Equations.
• Patient in the ED with chest pain? → Use the HEART Score Calculator. This is an acute triage tool, not a prevention tool.
• Canadian patient or Canadian clinical setting? → Use the Framingham Risk Calculator Canada, which follows Canadian Cardiovascular Society guidelines.
• Borderline PREVENT/ASCVD risk and considering a calcium scan? → Use the MESA Risk Calculator to incorporate your CAC score.
• Don't know your eGFR? → Use the eGFR Calculator first, then return to PREVENT.
• Patient has atrial fibrillation? → Use the CHA₂DS₂-VASc Calculator for stroke risk and anticoagulation guidance.

Important Notice

PreventCalculator.com is an independent educational resource and is not affiliated with the American Heart Association (AHA), the American College of Cardiology (ACC), or any medical institution. The PREVENT™ name belongs to the American Heart Association. Our calculators implement the published equations for educational purposes, are reviewed against the original source publications by our editorial team, and are not a substitute for professional medical advice. Always consult a qualified healthcare provider for medical decisions. Have a question or spot an error? Contact us at hello@preventcalculator.com.