Pack Years Calculator

How to Calculate Pack Years

If you are trying to calculate pack years you can do so with the following variables:

• Pack size


• Cigarettes smoked per day


• Years smoking

Then you can use the following formula to find the pack years value: Where:

• PY = Pack years


• PPD = Packs smoked per day (this is automatically calculated by our tool)


• YS = Years of smoking

Understanding Your Results

Your results from using this tool will be three different values. Mainly, you will get the pack years result. This number represents the number of years worth of cigarettes you have smoked. The higher this number is the more years worth of cigarettes you have smoked. Then, you will see the total number of cigarettes smoked. Finally, you will see the total number of packs that were smoked. Keep in mind this will likely never be exact unless you always smoked the same amount of cigarettes per day, every day, for those number of years.

How to Use the Pack Years Tool

This pack years tool is designed to be as simple and easy to use as possible. To use this tool you must do the following:

1. Enter the number of cigarettes in a pack. By default, this number is set to 20 so you can change it if needed.


2. Enter the average number of cigarettes smoked per day.


3. Enter the number of years that you have been smoking for.


4. Hit the calculate button and instantly get your results.

Calculation Example

Our uncle is an avid smoker and we want to see the pack years that they have smoked. We can use this tool to help us calculate that. They smoke cigarettes that have a pack size of 20, on average they smoke 25 per day and have been smoking for 12 years. We can plug those numbers into this tool then hit calculate. Once we do we learn that he has smoked 15 pack years, a total of 109,500 cigarettes, and a total of 5,475 packs.