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Pack Year Calculator
Calculate cumulative smoking history in pack-years
Pulmonology Guidelines: Pack-years are calculated by multiplying the number of packs smoked per day by the number of years the person has smoked (1 pack = 20 cigarettes). Enter smoking history details below.
Smoking History Parameters Input
Calculation Results
⚠️ Not medical advice. For pulmonology, clinical screening, and healthcare reference only. Smoking cessation support and lung cancer screening criteria must be evaluated strictly by a qualified physician.