Pack Year Calculator
Pack years are the standard way smoking history is recorded in medical notes. This tool does that arithmetic only.
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.
Frequently Asked Questions (FAQ)
What is a pack year?
Pack years are the standard way smoking history is recorded in medical notes: packs smoked per day multiplied by years smoked.
What does this tool calculate?
It does that arithmetic only, from packs per day, years smoked and cigarettes per pack.
What if my pack has more or fewer than 20 cigarettes?
You can adjust the cigarettes per pack value if yours differ from 20.
Is the result medical advice?
No. It is a record-keeping metric used in clinical history taking, not a risk score, and it does not diagnose anything.