What does the 10-year ASCVD Risk Calculator estimate?
This tool implements the 2013 ACC/AHA Pooled Cohort Equations (PCE), estimating the probability of a first hard ASCVD event over 10 years: nonfatal myocardial infarction, coronary heart disease death, or fatal/nonfatal stroke. It models a population probability, not whether an individual will have an event.
This is the legacy PCE model, not AHA PREVENT. As of this review, ACC states that PCE is no longer supported by its clinical policy or guidelines and directs users to PREVENT. This page is for understanding the historical equation, not current treatment decisions. Scores from different models are not interchangeable.
How to use the ASCVD calculator with cholesterol and blood pressure
Confirm that there is no established cardiovascular disease. Enter age in whole years, choose the original model sex and cohort, and supply total cholesterol, HDL, systolic blood pressure, blood-pressure treatment, current smoking and diabetes status. Every field is required.
- Use recent verified laboratory results and measured systolic blood pressure.
- Choose cholesterol mg/dL or mmol/L; changing units converts populated lipid fields.
- Use the original White or Black US cohort only when appropriate; this tool does not silently assign other populations to a cohort.
- Calculate and review the model limitations with a clinician.
Optional upper arm blood pressure monitors (paid link) may support home readings when its device and cuff are suitable. The calculator does not endorse a product or assess device validation.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases.
Pooled Cohort Equations: calculation method
The selected Table A coefficients multiply natural logs of age, total cholesterol, HDL and systolic blood pressure, together with the specified interaction and treatment/smoking/diabetes terms. This implementation retains the ACC reference estimator’s parameter precision. Their sum is L. Risk = 100 × [1 − S₀^exp(L − cohort mean)]. The baseline survival S₀ and mean differ for each of the four original cohorts.
The steps show the selected cohort, standardized inputs, logarithms, weighted sum, relative hazard and final probability. Cholesterol is converted from mmol/L using 38.67 mg/dL per mmol/L. Inputs are not automatically rounded into a different clinical category.
Understanding the risk chart and legacy risk bands
The diagram contains exactly 100 person symbols. Their gold share represents the calculated probability, with a partially filled symbol for a fractional percentage point. The colored bar uses a fixed linear 0–100% scale; its marker identifies the same unrounded probability as the result. Colors show the legacy bands listed below. These are population illustrations, not predictions about particular people, treatment benefits or counterfactual scenarios.
Legacy PCE descriptive bands are low below 5%, borderline 5% to below 7.5%, intermediate 7.5% to below 20%, and high at 20% or above. These labels alone do not determine treatment. Optional blood pressure log books (paid link) can help bring repeated readings to an appointment.
Published PCE example and clinical context
For age 55, total cholesterol 213 mg/dL, HDL 50 mg/dL, untreated systolic pressure 120 mm Hg, no smoking and no diabetes, the ACC reference implementation returns approximately 2.1% for White women, 3.0% for Black women, 5.4% for White men and 6.1% for Black men. Published Table A prints 5.3% for the White male illustration; small differences reflect parameter precision. This implementation uses the constants in ACC’s reference JavaScript rather than mixing rounded table constants. These differences reflect the original models and cohorts, not a biological rule for every person.
Keep the original lab report and medication list in an optional health record organizers (paid link). The Mean Arterial Pressure Calculator and Pulse Pressure Calculator answer different pressure-arithmetic questions; neither substitutes for ASCVD risk assessment.
Eligibility, model limitations and medical use
The 10-year model accepts ages 40–79, total cholesterol 130–320 mg/dL, HDL 20–100 mg/dL and systolic blood pressure 90–200 mm Hg. HDL must be lower than total cholesterol. The original equations were developed in US White and Black adult cohorts; their accuracy varies in other populations and settings. This tool deliberately provides no Other-cohort extrapolation.
Established cardiovascular disease returns an eligibility message rather than a primary-prevention score. The tool excludes lifetime risk, PREVENT, treatment effects, LDL-based recommendations and individual prognosis. It cannot evaluate symptoms. Seek urgent medical help for possible heart attack or stroke symptoms rather than using a risk calculator.
Discuss results with a qualified clinician before decisions about medication. Optional heart health cookbooks (paid link) is general reading, not personalized treatment. Health input values are processed in browser memory and are not put into URLs or stored by this calculator; existing site advertising and analytics still follow the site privacy policy.
ASCVD Risk Calculator FAQs
The original 2013 Pooled Cohort Equations, not PREVENT.
The 10-year PCE estimate is limited to whole ages 40–79.
No. This primary-prevention tool returns an eligibility message for established cardiovascular disease.
Yes. Total and HDL cholesterol convert using 38.67 mg/dL per mmol/L.
They identify the four original sex-specific US PCE models. This tool does not silently extrapolate to other cohorts.
No. This educational estimate is not a prescription. A clinician must interpret it in your clinical context.
Sources and methodology
Equations independently implemented and checked against the sources below, November 4, 2026. This is not a clinical validation or endorsement by the linked organizations.