10-Year CHD Risk (Framingham) Calculator
Educational estimate only — for adults 20-79 without known heart disease. Not medical advice.
Point Breakdown
| Age (55 yrs) | 8 pts |
| Total Cholesterol (220 mg/dL) | 3 pts |
| HDL Cholesterol (45 mg/dL) | 1 pts |
| Systolic BP (140 mm Hg, untreated) | 1 pts |
| Smoking (No) | 0 pts |
| Total Points | 13 pts |
| Diabetes (No) | Not a CHD equivalent |
| 10-Year CHD Risk | 12% |
| 10-Year CHD Risk | 12% |
Summary Statistics
What Is the Framingham 10-Year CHD Risk Score?
The Framingham 10-year coronary heart disease risk score is the original risk-scoring system to come out of the Framingham Heart Study, the longitudinal cohort that began in 1948 in Framingham, Massachusetts, and reshaped how medicine thinks about heart disease. The score estimates the probability that a person without known heart disease will experience a hard coronary event — a heart attack or coronary death — within the next decade. The version implemented here is the point-based system adopted by the National Cholesterol Education Program's Adult Treatment Panel III in 2001, which is the standard clinical form of the Framingham score in primary care. It assigns points for age, total cholesterol, HDL cholesterol, systolic blood pressure, blood pressure treatment status, and smoking, then maps the summed points to a ten-year risk percentage. What sets this Framingham version apart from the plain 10-year CHD risk tool is its handling of diabetes: ATP III designates diabetes a coronary heart disease risk equivalent, meaning a diabetic patient carries the same ten-year risk as someone who already survived a heart attack — at least twenty percent — so the score treats diabetes as an automatic high-risk classification regardless of the point total. That rule is encoded directly into the calculator: flip diabetes to yes and the risk displays as twenty percent or greater with the LDL goal tightened to under 100 milligrams per deciliter.
How the Framingham Score Is Calculated
The score is built from five point components summed into a total. Age carries the most weight and uses a sex-specific scale: a man aged 55 to 59 earns 8 points, a woman of the same age earns 8 as well, and the range stretches from minus 9 for men in their early twenties to 16 points for women in their late seventies. Total cholesterol points are age-dependent — 200 to 239 milligrams per deciliter earns 7 points in a man aged 20 to 39 but only 3 in a man aged 50 to 59 — because the relative contribution of cholesterol to risk declines as age itself dominates. HDL cholesterol is the one factor that can subtract points: 60 or above subtracts 1, while below 40 adds 2. Systolic blood pressure uses separate point columns for treated and untreated patients, because someone whose pressure is controlled only with medication carries higher residual risk than someone at the same reading naturally — an untreated 140 to 159 systolic adds 1 point for men, the same reading treated adds 2. Smoking points are also age-adjusted, worth 8 points to a young male smoker and just 1 past age 70. The five contributions are summed, and the lookup table converts the total into a ten-year risk: for men, 13 points maps to 12 percent, 15 points to 20 percent, and 17 points or more to over 30 percent. Then comes the ATP III diabetes rule: if diabetes is present, the score is superseded — the risk is managed as twenty percent or greater because diabetes confers the same event rate as established coronary disease, so the calculator displays at least twenty percent and applies the corresponding LDL goal of under 100. The point breakdown table shows every factor's contribution, so a change in any input maps directly to a change in points and therefore in risk.
Understanding Your Results
The headline percentage and the category banner are the clinical summary: low risk under ten percent, intermediate between ten and twenty, and high at twenty or above, with the ATP III LDL cholesterol goal shown alongside each band. If you entered diabetes, the banner reads high — CHD equivalent and the risk shows at least twenty percent, because the score's diabetes rule overrides the point math by design; the point total still displays for reference but no longer drives management. For everyone else, the point breakdown is the practical tool: it shows exactly which factors produced the total, and re-running the calculator after changing one input quantifies that factor's contribution in percentage points of risk — the difference between smoking and not smoking, between an HDL of 35 and an HDL of 55, or between treated and untreated blood pressure at the same reading. The Framingham score has known limits worth remembering: it predicts hard coronary events only, not stroke or heart failure; it was derived from a predominantly white New England cohort and can mis-calibrate in other populations; and it omits family history, inflammation, and other risk-enhancing factors. It also under-weights risk in younger adults, whose ten-year outlook can look low even when lifetime risk is substantial. Treat the result as the structured starting point of a conversation with a clinician, not as a verdict — this calculator is an educational estimate designed to make the Framingham method transparent, not a substitute for professional medical assessment.
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