This calculator provides general educational information based on published CDC and USPSTF guidelines for STI testing frequency. It is not a medical device, diagnostic tool, or substitute for individualized medical advice. The output reflects general population-level guidance and does not account for your specific health history, risk factors, symptoms, or provider recommendations. Do not rely on this calculator to determine whether you need testing — consult a qualified healthcare provider for recommendations specific to your situation. De Nihil LLC provides this tool on an informational basis only and assumes no liability for health decisions made in reliance on its output.