This calculator implements the laboratory-based 2008 Framingham general cardiovascular disease risk equation. It estimates the probability of a first general CVD event over 10 years from age, sex, cholesterol, systolic blood pressure, treatment, smoking and diabetes. The outcome included coronary disease, cerebrovascular events, peripheral artery disease and heart failure.
The model was developed in Framingham participants aged 30 to 74 who were free of CVD. It may not be well calibrated for another population or setting. Use it as educational information to discuss with a qualified healthcare professional, not as a diagnosis or treatment instruction.
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How to Use This Calculator
Select the sex-specific equation used by the published model.
Choose whether diabetes is present and enter age in completed years.
Enter HDL and total cholesterol. Select mg/dL or mmol/L separately for each value; mmol/L values are converted to mg/dL.
Enter systolic blood pressure in mmHg and indicate current smoking and treatment for hypertension.
Select Calculate. The page log-transforms the continuous values, applies the published coefficients and reports a one-decimal percentage.
The form labels the result “Low” below 10%, “Intermediate” from 10% through 19.9%, and “High” at 20% or more. Those labels are display bands used by this page. They are not, by themselves, treatment recommendations and should not be substituted for the thresholds in a current clinical guideline.
Use measured values from the same clinical assessment where possible. A laboratory report’s units matter: cholesterol uses a substance-specific conversion, so a generic mmol/L conversion cannot be borrowed from glucose or another analyte.
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Formula Used
For each sex, calculate S = β₁ln(age) + β₂ln(total cholesterol) + β₃ln(HDL) + β₄ln(systolic pressure) + β₅(smoker) + β₆(diabetes). The blood-pressure coefficient β₄ changes according to whether hypertension is treated; yes/no variables are coded 1 or 0.
Men: risk = 1 − 0.88936exp(S − 23.9802)
Women: risk = 1 − 0.95012exp(S − 26.1931)
The result is multiplied by 100. For cholesterol, the page converts mmol/L to mg/dL by multiplying by 38.67 before applying the natural logarithm.
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Variables Explained
Input
Meaning in the model
Sex
Selects the published male or female equation, coefficients, baseline survival and mean risk score.
Age
Completed years. The derivation sample was examined between ages 30 and 74.
Total cholesterol
Total blood cholesterol entered in mg/dL or mmol/L.
HDL cholesterol
High-density lipoprotein cholesterol in mg/dL or mmol/L.
Systolic blood pressure
The upper blood-pressure value in mmHg.
Hypertension treatment
Whether antihypertensive treatment is being used; it selects a different systolic-pressure coefficient.
Current smoker
A yes/no indicator for current smoking as defined in the underlying assessment.
Diabetes
A yes/no indicator for diabetes status.
10-year risk
Estimated probability of a first event within the model’s broad general-CVD outcome over 10 years.
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Worked Example
Consider a 61-year-old woman who is a current smoker, does not have diabetes, is not receiving blood-pressure treatment, and has total cholesterol of 180 mg/dL, HDL of 47 mg/dL and systolic pressure of 124 mmHg. Applying the women’s coefficients:
S = 2.32888ln(61) + 1.20904ln(180) − 0.70833ln(47) + 2.76157ln(124) + 0.52873(1) + 0.69154(0) = approximately 26.9653.
Risk = 1 − 0.95012exp(26.9653 − 26.1931) = approximately 0.1048, or 10.5% when rounded as the page does. The page places that result in its “10% to under 20% band.” In plain language, the estimate corresponds to roughly 10 or 11 events among 100 people with comparable modeled characteristics over 10 years. It does not predict which individual will have an event.
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Why Use This Calculator?
The percentage is an estimate with uncertainty. A 10.5% estimate does not mean an event will occur 10.5 years from now. It summarizes outcomes among people with similar modeled risk factors.
“General CVD” is broader than calculators that estimate only ASCVD, coronary disease or stroke, so differently named tools need not agree. Age range, population, prior disease and prediction horizon also matter.
A clinician can interpret the estimate with repeated measurements, family history, existing disease, medicines and current guidelines. Seek urgent care for possible emergency symptoms; a percentage cannot assess an acute event. Zero or negative values are mathematically invalid because the equation uses logarithms.
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Common Mistakes
Using the wrong cholesterol unit: 5 mmol/L is not 5 mg/dL; select the unit beside each lipid field.
Comparing unlike outcomes: general CVD, coronary disease and ASCVD calculators can legitimately produce different percentages.
Entering diastolic pressure: this equation uses systolic pressure, the upper value.
Misreporting treatment: the treated and untreated systolic-pressure coefficients differ even when the pressure reading is identical.
Using an age outside the derivation range without caution: extrapolation may be misleading.
Entering zero or negative measurements: natural logarithms require positive age, lipid and pressure values.
Treating the page’s bands as medical orders: prevention decisions require current guidance and individual assessment.
Rounding inputs: use the available measured values and let the page round the final percentage.
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Frequently Asked Questions
What does this CVD percentage predict?
It estimates 10-year risk of a first event in the broad 2008 Framingham general-CVD outcome, which included coronary disease, cerebrovascular events, peripheral artery disease and heart failure.
Is this the same as an ASCVD risk estimate?
No. ASCVD tools usually use a different outcome definition and may use different populations, coefficients and guidance. Do not compare the percentages without checking the model named by each tool.
Who was the Framingham equation developed for?
The published study derived the functions from participants examined at ages 30–74 who were free of CVD. Accuracy can differ in other ages, populations and clinical settings.
Can I enter cholesterol in mmol/L?
Yes. Select mmol/L beside the relevant field. The page multiplies by 38.67 to obtain mg/dL before using the equation. Check each selector because HDL and total cholesterol have separate unit choices.
Why does blood-pressure treatment matter?
The published model assigns different coefficients to systolic pressure for treated and untreated people. Select treatment status accurately even if the current reading is controlled.
Should I change medicine based on this result?
No. The estimate is educational and cannot account for every clinical factor. Discuss measurements, model choice and prevention options with a qualified healthcare professional before changing care.
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