Pack Year Calculator
Pack years are the standard way smoking history is recorded in medical notes. This tool does that arithmetic only.
Enter your details above and the result will appear here.
How to use
- Enter how many packs you smoked per day on average.
- Enter for how many years.
- Optionally adjust cigarettes per pack if yours differ from 20.
Note
Pack years = packs per day x years smoked. This is a record-keeping metric used in clinical history taking — it is not a risk score and does not diagnose anything. Quitting at any point improves health outcomes. Estimate only — not medical advice.