Estimate equivalent statin doses based on expected LDL-cholesterol reduction and intensity category. This tool is designed for educational use and should be used alongside patient-specific clinical judgment.
Select a current statin and dose, then choose the statin you want to switch to.
A statin conversion calculator helps estimate a comparable dose when switching from one statin to another. In practice, clinicians often switch statins for reasons such as side effects, formulary changes, drug interactions, kidney or liver considerations, or a need for stronger LDL-cholesterol lowering. While these tools can speed up decisions, they are best used as a starting point rather than a final prescription.
Most conversion tools are based on expected percent reduction in LDL-C. For example, if a patient is taking a dose that typically lowers LDL-C by around 40%, the calculator finds a dose of the target statin that also lowers LDL-C by about 40%. This creates a practical “equivalent” dose estimate.
Equivalent does not mean chemically equal or perfectly interchangeable in every patient. It means the doses are expected to produce a similar LDL-lowering effect on average. Individual outcomes can differ substantially. Some patients may respond more strongly or weakly than expected, and tolerability profiles vary by statin.
Statin therapy is commonly grouped by expected LDL-C reduction:
Intensity categories are often more clinically useful than exact dose matching. If a patient requires high-intensity therapy, a conversion that drops to moderate-intensity may not meet treatment goals.
After selecting an estimated equivalent dose, the next step is not to assume success—it is to verify response and safety. A practical workflow includes baseline evaluation, follow-up lipid panel, symptom review, and shared decision-making.
Conversion calculators simplify complex biology. They cannot fully account for age-related pharmacokinetics, adherence patterns, thyroid disease, nephrotic syndrome, inflammatory states, diabetes progression, or genetic variation in statin transport/metabolism. They also do not replace guideline-directed cardiovascular risk assessment.
In addition, certain doses may carry specific cautions in modern practice. For example, higher doses of some statins can have increased adverse-event risk or prescribing restrictions in specific contexts. Always verify current local guidance and product labeling.
No. It is accurate only as a population-level estimate. Individual LDL-C response and side effects can differ significantly, so follow-up testing is essential.
It is not recommended. Lipid follow-up helps confirm that the new regimen achieves the intended LDL reduction and intensity category.
Not always. LDL lowering is a major predictor of benefit, but overall outcome depends on adherence, baseline risk, inflammation, and duration of treatment.
No. This tool is educational and should support, not replace, clinician judgment and individualized patient care.
A statin conversion calculator is a useful aid for estimating comparable LDL-lowering doses when changing therapy. The safest use is to pair the estimate with clinical context, guideline-based intensity goals, interaction checks, and follow-up lipid monitoring. When used this way, dose conversion supports more consistent and effective cholesterol management.