How the smoking cost is calculated
Dividing the pack price by cigarettes per pack gives the price of a single cigarette. Multiplying that by how many you smoke a day, then by 365 days and the number of years, scales the cost from a single cigarette up to a full smoking period.
- Pack price — price of one pack
- Cigarettes per pack — cigarettes in one pack (standard pack = 20)
- Cigarettes per day — how many you smoke daily
- Years — expected years of smoking, for the total-cost output
More detail
Why the standard pack is 20 cigarettes
Most packs sold in Korea and worldwide hold 20 cigarettes, which is why it's the default here — but some products come in 10-cigarette packs, so adjust the "Cigarettes per pack" field if yours differs; the per-cigarette price and every downstream number scale from that figure.
Half a pack a day adds up fast
At the defaults above — 10 cigarettes a day from a ₩4,500, 20-cigarette pack — the price per cigarette is ₩225, which comes to ₩2,250 a day. That's a small number daily, but multiplied by 365 days it becomes over ₩820,000 a year, and over ₩8 million across a decade of smoking at the same rate.
Practical tip. Try raising "Cigarettes per day" to your actual count on a heavier day and lowering "Years" to just how long you plan to keep smoking at that rate — the total-cost output changes fast, which is often the number that motivates cutting back.
Frequently asked questions
How much does smoking a pack a day cost per year?
At the defaults above, a ₩4,500 pack of 20 gives a price of ₩225 per cigarette. Smoking a full pack (20 cigarettes) a day costs ₩4,500 daily, or ₩4,500 × 365 = ₩1,642,500 a year — enter 20 in "Cigarettes per day" to see it directly.
How is the daily cost converted from a pack price?
The pack price is divided by cigarettes per pack to get a price per cigarette (₩4,500 ÷ 20 = ₩225 by default), then multiplied by how many cigarettes you smoke per day. That's the "Daily cost" output above.
What does the total cost over 10 years add up to?
The yearly cost is multiplied by the number of years you enter. At the defaults — 10 cigarettes a day, ₩4,500/pack, 10 years — that's ₩821,250 a year × 10 = ₩8,212,500 total, shown in the "Total cost" output.
Does it matter if my pack has a different number of cigarettes?
Yes — set "Cigarettes per pack" to match your actual pack (most are 20, some slim or single-serve packs hold fewer). The price-per-cigarette figure the whole calculation is built on comes directly from that number, so an incorrect pack size skews every output.