Checked 
An average, not a countdown
A cigarette costs about 20 minutes of life expectancy on average, according to a December 2024 UK government report on a UCL estimate. This is a population-level estimate based on long-term smoking patterns, not a measurable loss of time after each cigarette.
You cannot use it to calculate how long you personally will live. Skipping ten cigarettes does not guarantee another 200 minutes of life.
Turn the headline into an action
- Write down a possible quit date, or start by booking an appointment for advice.
- Note an everyday situation in which you often smoke, so you can discuss it with an adviser.
- Contact a local stop-smoking service or ask a healthcare professional about suitable support.
The goal is to stop smoking completely, rather than collect points on a supposed life-expectancy counter.
Why the distinction matters
The estimate describes a pattern across a population. Your individual risk trajectory and the benefits of quitting vary. The number can provide motivation, but it is not a personal prediction or a substitute for advice. Discuss which support or medicines might suit you with a qualified professional.
Sources
Selected references used to verify or support this tip.
- Quit for a week and save a day, say health experts Department of Health and Social Care · government
- The price of a cigarette: 20 minutes of life? Addiction · scientific