Health

Pack Year Calculator

Estimate smoking pack-years.

Calculated Output

Pack-years 10

Formula: pack-years = packs/day × years

Step-by-Step Breakdown

1. Values used:

2. Packs per day = 1

3. Years smoked = 10

5. Pack-years = Packs per day x Years smoked = 1 x 10 = 10

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The math behind it

pack-years = packs per day × years smoked (1 pack = 20 cigarettes).

1 pack/day for 10 years → 10 pack-years.

Half a pack?

Enter 0.5 packs/day — pack-years scale linearly.