Half a pack a day
10 cigarettes a day for 20 years
A habit most people would call moderate, added up: the cigarettes, the years of life, what comes back, and the money.
Written by Lee H. Last reviewed 14 September 2026.
What it adds up to
Ten a day for twenty years is 73,050 cigarettes, counting leap years. That is 3,652 packs of 20, or 10 pack-years, the unit doctors use for smoking history. The pack-years calculator works that out for any habit.
On the best current estimate, each cigarette costs about 17 minutes of life for a man and 22 for a woman. That comes from Jackson, Jarvis and West, "The price of a cigarette: 20 minutes of life?", Addiction, 2025.
What it has likely cost in years
Multiplied out, 73,050 cigarettes comes to about 2.4 years of life for a man and 3.1 years for a woman. Below eight years of loss the model this site uses keeps the multiplication straight, so these are the plain products.
That is a real amount of time, and it is also a population average. Some people who smoke ten a day for twenty years lose far more, some lose less, and a calculator cannot tell you which of those you are.
| Years smoked | Cigarettes | Man | Woman |
|---|---|---|---|
| 10 | 36,525 | 1.2 years | 1.5 years |
| 20 | 73,050 | 2.4 years | 3.1 years |
| 30 | 109,575 | 3.5 years | 4.6 years |
How much comes back if you stop now
This is the part that changes with age. Jha et al., in the New England Journal of Medicine in 2013, found that people who stop before about 35 recover close to all of what smoking would have taken, and the share falls with each decade after that.
Someone who started at 18 and smoked ten a day for twenty years is 38 today. At that age the model puts about 92% of the loss within reach, and most of it arrives early:
| Smoke free for | Man | Woman |
|---|---|---|
| 1 year | 0.45 years back | 0.58 years back |
| 5 years | 1.48 years back | 1.91 years back |
| 10 years | 1.95 years back | 2.52 years back |
| In total | 2.16 years | 2.80 years |
The same twenty years started at 25 ends at 45, where about 74% is within reach: 1.74 years for a man and 2.25 for a woman. The count of cigarettes is identical. The age at stopping is what moved.
The money
3,652 packs, multiplied by what a pack costs you. The figures below are in whatever currency your price is in.
| Price per pack | 20 years | A year |
|---|---|---|
| 8 | 29,220 | 1,461 |
| 10 | 36,525 | 1,826 |
| 12 | 43,830 | 2,192 |
| 15 | 54,788 | 2,739 |
| 20 | 73,050 | 3,653 |
Those totals use one price for all twenty years. Prices rose over that time almost everywhere, so a total at today's price sits at the high end of what actually went out. The yearly column is the useful one looking forward: it is what stopping keeps in your pocket from here, at today's price.
This page reports a motivational estimate built from population averages, and your own outcome can differ. It does not diagnose, treat or prevent any condition and gives no medical advice. Prices are examples and no guarantee is made or offered about the accuracy of any figure or calculation on this site. Talk to a doctor or a quitline about stopping smoking. In the US, that is 1-800-QUIT-NOW.
Keep reading
Where to go next
Pack-years calculator
Your smoking history in the unit a doctor uses, and what it is used for.
Smoking for 30 years, or 40, or 50
The same arithmetic for longer habits, and where the curve bends.
Quitting at 40
How much comes back when you stop around the age this page ends at.
Quit smoking calculator
Your own age, count and years, in the browser, with nothing sent anywhere.
Sources
- Jackson, S. E., Jarvis, M. J. and West, R., "The price of a cigarette: 20 minutes of life?", Addiction, 2025.
- Jha, P. et al., "21st-Century Hazards of Smoking and Benefits of Cessation in the United States", New England Journal of Medicine, 2013.
Every step of the model is on the methodology page, or go back to all guides.