Free Smoking Pack-Year Index & Clinical Lung Risk Calculator Online
Calculate clinical smoking pack-years (packs per day × years smoked) used by pulmonologists and oncologists to determine LDCT lung cancer screening eligibility. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Enter Cigarettes Smoked Per Day
Input average daily cigarettes (20 cigarettes = 1 pack).
Enter Years Smoked
Input total years as an active smoker.
Calculate Pack-Years
Formula: (Cigarettes per day / 20) × Years smoked.
Review USPSTF Guidelines
Check whether you meet the 20 pack-year threshold for annual lung CT screening.
Frequently Asked Questions
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