What is the ASCVD Calculator?
The ASCVD Calculator estimates a person's 10-year risk of developing a first major atherosclerotic cardiovascular disease event. ASCVD stands for atherosclerotic cardiovascular disease, a group of conditions caused by plaque buildup in the arteries that can lead to heart attack and stroke.
This calculator is based on the 2013 ACC/AHA Pooled Cohort Equations (PCE). The equations were developed to estimate the probability of a first hard ASCVD event using several established cardiovascular risk factors.
| At a glance | Description |
|---|---|
| What it estimates | 10-year risk of a first ASCVD event |
| Model | 2013 ACC/AHA Pooled Cohort Equations |
| Result | Estimated risk expressed as a percentage |
| This calculator's age range | 40–75 years |
| Intended setting | Primary prevention in people without known ASCVD |
| LDL-C eligibility range | 70–189 mg/dL (1.81–4.90 mmol/L) |
| Main outcomes | Myocardial infarction, coronary heart disease death, and fatal or nonfatal stroke |
For example, an ASCVD risk result of 8% means that among people with a similar risk-factor profile, approximately 8 out of 100 would be expected to experience an ASCVD event over the next 10 years. It is a statistical estimate rather than a prediction that a specific individual will or will not have a cardiovascular event.
Important: The ASCVD Calculator supports risk assessment and clinician-patient discussion. It does not diagnose cardiovascular disease and should not be used as the sole basis for starting, stopping, or changing medication.
How does the ASCVD Calculator work?
The ASCVD Calculator combines demographic information, cholesterol measurements, blood pressure and several clinical risk factors. The Pooled Cohort Equations use sex- and race-specific statistical models rather than a simple points system.
The calculator uses the following information:
| Input | Why it matters |
|---|---|
| Age | Cardiovascular risk generally rises substantially with age |
| Sex | The original PCE uses different equations for men and women |
| Race | The legacy 2013 model includes race-specific equations |
| Total cholesterol | Reflects the overall amount of cholesterol in the blood |
| HDL cholesterol | Higher HDL-C is generally associated with lower calculated risk |
| Systolic blood pressure | Elevated blood pressure is an important ASCVD risk factor |
| Hypertension treatment | The equation distinguishes treated from untreated systolic BP |
| Current smoking | Smoking significantly increases cardiovascular risk |
| Diabetes | Diabetes is associated with substantially higher ASCVD risk |
LDL cholesterol is important for determining whether this particular calculator is appropriate, but LDL-C itself is not one of the variables directly entered into the original Pooled Cohort Equation.
The calculation formula
The PCE is based on a Cox proportional-hazards model. Its general structure can be represented as:
10-year ASCVD Risk (%) = 100 × [1 − S0(10)exp(LP − M)]
Where:
LP = β1X1 + β2X2 + ... + βnXn
- S₀(10) = baseline probability of remaining event-free at 10 years
- LP = linear predictor calculated from the patient's risk factors
- β = coefficient assigned to each variable
- X = patient-specific value or transformed value
- M = reference mean for the applicable equation
The actual Pooled Cohort Equations contain logarithmic transformations and interaction terms, so manually multiplying the raw values above is not equivalent to the full ASCVD calculation.
If cholesterol values need to be converted between commonly used units:
Cholesterol (mg/dL) ≈ Cholesterol (mmol/L) × 38.67
This allows the ASCVD Calculator to work with cholesterol results reported in either mg/dL or mmol/L when appropriate unit conversion is supported.
How to use ASCVD Calculator?
Using the ASCVD Calculator requires recent and accurate clinical information. Incorrect cholesterol or blood-pressure values can materially change the estimated risk.
- Confirm that the calculator is appropriate. This implementation is intended for adults aged 40–75 without known ASCVD and with LDL-C between 70 and 189 mg/dL (1.81–4.90 mmol/L). People with established ASCVD require a different clinical approach.
- Enter age and sex. Use the patient's current age and select the appropriate sex option used by the Pooled Cohort Equations.
- Enter cardiovascular risk factors. Specify whether the person currently smokes and whether diabetes is present.
- Add laboratory and blood-pressure data. Enter total cholesterol, HDL cholesterol and systolic blood pressure. Make sure the cholesterol unit selected in the calculator matches the laboratory report.
- Indicate blood-pressure treatment and race category. Select whether antihypertensive medication is currently being used and choose the race category required by this legacy model.
- Review the calculated percentage in clinical context. The result should be considered together with family history, LDL-C, chronic kidney disease, metabolic syndrome, inflammatory disorders, triglycerides, lipoprotein(a), coronary artery calcium and other risk-enhancing information when relevant.
A calculated percentage is most useful as the beginning of a risk discussion rather than an automatic treatment decision.
Understanding your ASCVD risk result
The traditional Pooled Cohort Equation framework commonly grouped 10-year estimates into four categories:
| 10-year ASCVD risk | Traditional PCE category | General interpretation |
|---|---|---|
| <5% | Low risk | Lifestyle optimization is generally emphasized |
| 5% to <7.5% | Borderline risk | Additional risk-enhancing factors may affect management |
| 7.5% to <20% | Intermediate risk | Clinician-patient risk discussion is particularly important; additional testing such as CAC may sometimes help |
| ≥20% | High risk | Indicates a substantially elevated predicted 10-year risk |
These percentages should not be interpreted as fixed boundaries between "healthy" and "unhealthy." Two people with the same calculated result may have different treatment considerations because the model does not capture every clinically relevant factor.
Current guideline note: The 2013 Pooled Cohort Equations are now a legacy risk model. The 2026 ACC/AHA dyslipidemia guideline recommends the newer PREVENT-ASCVD equations instead of PCE for contemporary primary-prevention lipid management. PREVENT is race-free, uses more contemporary populations and applies different risk thresholds. Therefore, the traditional categories above describe interpretation of this ASCVD Calculator and should not be substituted for current PREVENT-based treatment recommendations.
The calculator is still useful for understanding the established PCE approach, reproducing historical ASCVD risk estimates and interpreting older clinical recommendations or studies that used the 2013 model.
ASCVD Calculator FAQ
What does an ASCVD Calculator result of 7.5% mean?
A result of 7.5% represents an estimated 7.5% probability of experiencing a first ASCVD event during the next 10 years among people with a similar risk profile. Historically, 7.5% was an important threshold in PCE-based cholesterol guidelines, but the percentage should always be interpreted with other clinical information rather than used as an automatic treatment cutoff.
Can I use the ASCVD Calculator if I already have cardiovascular disease?
No. This version is designed for primary prevention, meaning people without known ASCVD. A history of myocardial infarction, ischemic stroke or other established atherosclerotic cardiovascular disease generally places a patient in a different clinical management pathway where calculating a first-event risk is not appropriate.
Why does the ASCVD Calculator ask for race?
Race is included because the original 2013 Pooled Cohort Equations were developed using separate equations for African American and White populations. For the Other option, this calculator uses the White equation, so the result may under- or overestimate risk. Contemporary PREVENT equations do not use race as a predictor.
Does LDL cholesterol affect the ASCVD calculation?
LDL-C is not directly included as a predictor in the Pooled Cohort Equation. Instead, the formula uses total cholesterol and HDL cholesterol. However, LDL-C remains clinically important: this implementation is intended for people with LDL-C of 70–189 mg/dL, and LDL-C level can independently influence prevention and treatment decisions.
Is the ASCVD Calculator still recommended in 2026?
The traditional ASCVD Calculator based on the 2013 Pooled Cohort Equations is no longer the preferred ACC/AHA tool for contemporary primary-prevention lipid risk assessment. The 2026 guideline recommends PREVENT-ASCVD for that purpose. The older calculator may nevertheless remain useful when reviewing historical PCE-based risk estimates, educational material, research or recommendations that specifically reference the 2013 equations.