For the interactive calculator, open the full CalcHealth page.
Open Full CalculatorFrequently Asked Questions
How many cigarettes are in one pack?
A standard pack-year calculation uses 20 cigarettes per pack.
Calculate smoking pack-years from cigarettes per day and years smoked.
For the interactive calculator, open the full CalcHealth page.
Open Full CalculatorA standard pack-year calculation uses 20 cigarettes per pack.