Pack Year Calculator: Easily Assess Your Smoking History

This pack year calculator tool will help you determine your exposure to cigarettes by calculating the total number of packs you’ve smoked over the years.

Pack Year Calculator

How It Works

The pack year calculator helps users estimate the total number of packs of cigarettes they have smoked over a period of time. One “pack year” is equivalent to smoking 20 cigarettes (one pack) per day for one year. The calculation considers the average number of cigarettes smoked each day and the number of years spent smoking to arrive at the total pack years.

How to Use It

To use this calculator:

  1. Enter the average number of cigarettes you smoke each day in the first field.
  2. Enter the total number of years you have been smoking in the second field.
  3. Click the “Calculate” button to see your total pack years.


This calculator provides an estimate based on two self-reported figures and assumes a consistent smoking habit over the reported period. Variations in smoking habits, such as changes in the intensity of smoking or temporary periods of quitting, are not accounted for. Additionally, this simplified method may not be as precise as detailed medical assessments.

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