Free CVD risk calculator — calculate your current 10-year cardiovascular disease risk, then model exactly how much quitting smoking, lowering blood pressure, starting a statin, or losing weight would reduce it. Powered by validated 2023 AHA PREVENT equations. No sign-up.
AHA PREVENT 2023 equations · Ages 30–79 · No prior CVD
Adjust the interventions below to see how each one would reduce your personal CVD risk.
Most cardiovascular risk calculators tell you your risk. This one goes further — it shows you how much each specific change reduces it. After calculating your current 10-year total CVD risk using the validated 2023 AHA PREVENT equations, you can model four key interventions: quitting smoking, lowering blood pressure, starting statin therapy, and losing weight.
The risk reduction estimates are derived directly from the PREVENT equation coefficients — they are not generic estimates but are personalized to your specific risk profile. Someone with intermediate risk (12%) will see larger absolute reductions from each intervention than someone with low risk (3%), because the same relative change in risk factors translates to a larger absolute percentage-point reduction at higher baseline risk.
Absolute Risk Reduction is calculated for your specific values not generic population averages. Higher-risk individuals see larger absolute benefits from each intervention.
Quit smoking, lower blood pressure, add statin therapy, and reduce BMI — the four most impactful modifiable CVD risk factors.
Risk reduction estimates derived from validated 2023 AHA PREVENT coefficients, not generic multipliers.
Start by entering your current health values in Step 1 — the same inputs as the PREVENT Calculator (age, sex, blood pressure, cholesterola, eGFR, BMI, diabetes, and smoking status). Click "Calculate My CVD Risk" to see your current 10-year risk.
Then in Step 2, adjust the intervention sliders. The default settings model four interventions simultaneously: quitting smoking, lowering SBP to 120 mmHg, adding a statin, and reaching a BMI of 25. You can change any of these to match your specific situation for example, if you are already on a statin, toggle "No statin" to exclude that from the projection, and adjust the SBP target to whatever your doctor is aiming for.
The results show your current vs projected risk as a side-by-side comparison, the total Absolute Risk Reduction, and a breakdown of how much each individual intervention contributes.
A common source of confusion in cardiovascular medicine is the difference between absolute and relative risk reduction. A statin might be described as reducing cardiovascular risk by "25%." But 25% of what? If your baseline risk is 4%, a 25% relative reduction brings it to 3% — a 1 percentage-point absolute reduction. If your baseline risk is 20%, the same 25% relative reduction brings it to 15% — a 5 percentage-point absolute reduction.
This calculator shows you absolute risk reduction — the number of percentage points your 10-year risk drops. This is the most clinically meaningful number for individual patients because it directly answers "how much does this intervention actually help me specifically?"
Your 10-year CVD risk is not fixed. The four most impactful modifiable factors like smoking, blood pressure, cholesterol, and weight can meaningfully reduce your score when addressed. The key insight this calculator provides is that the same intervention delivers larger absolute benefit at higher baseline risk. If your current 10-year risk is 15%, quitting smoking might reduce it by 4–5 percentage points. If your risk is 4%, the same change might reduce it by only 1 point. This is why personalized modeling matters more than generic advice.
The most effective sequence for most patients is:
Smoking is one of the strongest risk factors in the AHA PREVENT equations. Based on the PREVENT smoking coefficient, quitting eliminates the direct smoking contribution to your CVD risk score. The absolute benefit varies by baseline risk typically 2–6 percentage points reduction in 10-year CVD risk for current smokers with other risk factors present.
Importantly, the benefit extends beyond what any calculator can capture. Clinical studies show that ex-smokers' cardiovascular risk continues declining over 5–15 years after quitting, as arterial inflammation resolves, platelet function normalizes, and HDL cholesterol gradually improves. The PREVENT model captures the point-in-time benefit at the time of quitting — the long-term benefit is even greater.
Statins reduce cardiovascular risk through two mechanisms: directly lowering LDL cholesterol (and non-HDL cholesterol), and through pleiotropic anti-inflammatory effects. The 2023 AHA PREVENT equations include a statin coefficient that reflects real-world outcomes data from statin users in the derivation cohort.
In absolute terms using the PREVENT calculator, statin therapy typically contributes 1–4 percentage points of 10-year CVD risk reduction, with larger absolute benefits at higher baseline risk. Clinical trials consistently show high-intensity statins achieve roughly 50% LDL reduction and 25–35% relative reduction in major cardiovascular events. This is why statin therapy is most impactful for intermediate and high-risk individuals — the same relative reduction translates to a much larger absolute benefit when your baseline risk is 15% versus 4%.
The PREVENT equations model blood pressure both as a continuous variable (the SBP value itself) and as a binary treatment variable (on vs off antihypertensive medication). This means blood pressure medication provides independent benefit beyond just the number reduction reflecting the additional cardioprotective effects of specific drug classes like ACE inhibitors and ARBs.
As a general rule, each 10 mmHg reduction in systolic blood pressure is associated with approximately 20% relative risk reduction in cardiovascular events. Use this calculator to model your specific target — if your doctor wants to reduce your SBP from 145 to 125 mmHg, enter 125 in the target field to see the projected absolute benefit for your risk profile specifically.
BMI is a direct input in the AHA PREVENT equations, meaning weight loss has a measurable, quantifiable effect on your calculated CVD risk — independent of its effects on blood pressure and cholesterol. The PREVENT BMI coefficient is particularly strong for heart failure risk, where obesity is one of the leading drivers.
A 5-unit BMI reduction (for example, from 35 to 30) typically reduces 10-year total CVD risk by 1–3 percentage points in the PREVENT model. The actual benefit of weight loss is likely larger than the model shows because it also improves blood pressure, cholesterol, and insulin sensitivity effects that are partially captured through those separate inputs. Use this calculator to model your target BMI and see the combined benefit when weight loss is combined with other interventions.
Pharmaceutical marketing commonly uses relative risk reduction (RRR) because it sounds more impressive. A drug that reduces your risk from 2% to 1% can be described as achieving a "50% risk reduction" technically true, but the absolute reduction is only 1 percentage point. The same drug used in a higher-risk patient going from 20% to 10% achieves the same 50% relative reduction but a 10 percentage-point absolute reduction.
Absolute risk reduction (ARR) is what this calculator shows the actual number of percentage points your 10-year risk drops. For individual patients, ARR is the most clinically meaningful number because it directly answers "how much does this intervention actually help me?" rather than "how does this intervention compare to doing nothing in a population." When discussing treatment options with your doctor, ask for the ARR, not the relative risk reduction.
Based on the PREVENT equation smoking coefficient, quitting eliminates the direct smoking contribution to risk. The absolute benefit depends on your baseline risk — typically 2–6 percentage points over 10 years. Smoking is one of the largest single modifiable risk factors in the PREVENT equations, with a larger relative effect than blood pressure or cholesterol in many profiles. Risk also continues to decline over years after quitting, independent of the model estimate shown here.
The PREVENT equations include a statin coefficient that reflects real-world population data on statin use. Statin therapy typically contributes 1–4 absolute percentage points of risk reduction in the 10-year CVD model. Clinical trials show statins reduce major cardiovascular events by roughly 25–35% relatively, with larger absolute benefits at higher baseline risk exactly the pattern this calculator demonstrates.
The PREVENT equations use a treated vs untreated SBP structure, meaning blood pressure medication provides benefit beyond just the SBP number itself. Each 10 mmHg reduction in SBP is associated with roughly 20% relative risk reduction. In this calculator, you can model any target SBP — try entering your doctor's target to see the projected benefit specifically for you.
The PREVENT Calculator gives you a single snapshot of your current risk. This calculator adds a second layer: it lets you model what your risk would be under different scenarios. It is designed to answer the question "what should I prioritize?" particularly useful if you have multiple modifiable risk factors and want to understand which intervention delivers the most benefit for your specific risk profile.