Calculator

Cigarettes	per day	yrs
Cigarettes	per day	yrs
Cigarettes	per day	yrs
Cigars or spliffs	per day	yrs
Cigarillos	per day	yrs
Pipe (no. of bowls)	per day	yrs
Tobacco (ozs)	per week	yrs
Tobacco (grams)	per week	yrs
Water pipe (20 min session)	per week	yrs

This calculator helps to produce a numerical value of lifetime tobacco exposure called pack years. A pack year is defined as twenty cigarettes smoked everyday for one year. People who smoke often vary their smoking habits over the years which can make it difficult to create a pack score. This smoking pack year calculator simplifies the task.