Free tool · Australia
Pack-Year Calculator
A pack-year is one pack (20 cigarettes) per day for one year. Doctors use it to estimate your lifetime smoking exposure and lung disease risk.
Your pack-years
7.5
(15/day × 10 years) ÷ 20 per pack
Risk band
Lower range
Risk is real but lower than long-term heavy smokers. Quitting now keeps it that way — lung function rebuilds fast in the first year.
How to use this number
- Take it to your GP — it helps decide if low-dose CT lung screening is worth a conversation.
- Use it as your baseline. Every smoke-free year from today reduces forward risk.
- Pair it with a quit plan — see NRT, cold turkey, or prescription aids.
Limits of pack-years
Pack-years don't account for vaping, rollies (which often deliver more tar), passive smoke, or genetics. Treat the number as a useful flag, not a verdict.