Free · Based on NHS recovery data

Quit Smoking Timeline

What happens to your body when you stop smoking? Pick your quit date to see exactly which health milestones you've already reached — and what's coming next.

Health milestones reached
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Pulse rate20 minutes
After 20 minutes, your pulse rate returns to normal.
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Oxygen levels8 hours
After 8 hours, your blood oxygen levels return to normal.
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Carbon monoxide cleared1 day
After 1 day, carbon monoxide is eliminated from your body.
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Nicotine expelled2 days
After 2 days, all nicotine has been expelled from your body.
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Taste and smell3 days
After 3 days, your ability to taste and smell is greatly improved.
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Easier breathing3 days
After 3 days, your bronchial tubes relax and breathing gets easier.
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Energy levels4 days
After 4 days, your energy levels return to normal.
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Bad breath gone1 week
After 1 week, smoking-related bad breath is gone.
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Gums and teeth14 days
After 14 days, blood circulation in your gums and teeth improves.
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Brighter teeth1 month
After 1 month, your teeth stain less and calculus build-up slows.
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Circulation2 months
After 2 months, your circulation is greatly improved.
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Gum recovery3 months
After 3 months, the texture and colour of your gums return to normal.
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Immunity and lungs6 months
After 6 months, your immunity and lung function improve.
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Heart disease risk halved1 year
After 1 year, your risk of heart disease falls to about half that of a smoker.
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Lung cancer risk halved10 years
After 10 years, your risk of lung cancer falls to half that of a smoker.
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Heart attack risk normalised15 years
After 15 years, your risk of heart attack matches that of a never-smoker.
Watch your body heal, milestone by milestone.

SmokOver tracks your recovery timeline live from your quit date, counts down to your next milestone, and rewards each one with a collectible health card.

▶ Get SmokOver free on Google Play

What happens when you quit smoking?

Your body starts to repair itself within 20 minutesof your last cigarette, and the benefits compound for years afterward. The interactive timeline above maps this recovery against your own quit date, but here's the full journey most people follow.

The first 24 hours

Your pulse rate normalises within 20 minutes. By 8 hours your blood oxygen levels recover, and after a full day the carbon monoxide from cigarettes has cleared from your bloodstream — meaning more oxygen is reaching your heart and muscles.

The first week

Around 48 hours in, nicotine is largely gone from your body — this is often when cravings peak. Push through and your sense of taste and smell sharpen, and your breathing starts to feel easier as your bronchial tubes relax.

Months and years

Circulation improves within weeks, and lung function keeps climbing. After one year your risk of heart disease drops to roughly half that of a smoker. After a decade your lung-cancer risk falls by half, and by 15 years your heart-attack risk matches that of someone who never smoked.

Track your recovery in real time

Knowing the timeline is motivating; seeing your own progress is what makes it stick. The free SmokOver app counts down to your next milestone from your personal quit date, celebrates each one with a collectible health card, and shows your savings and cigarettes avoided alongside it.

Frequently asked questions

What happens when you first quit smoking?
Recovery begins within minutes. After 20 minutes your pulse rate returns to normal, after 8 hours your blood oxygen recovers, and after 24 hours the carbon monoxide from smoking is cleared from your body.
How long does nicotine stay in your body after quitting?
Most nicotine is expelled from your body within about 48 hours of your last cigarette (longer if you use nicotine replacement). This is often when cravings peak, then start to ease.
When do the health benefits of quitting smoking start?
Almost immediately, and they keep building. Within days your taste and smell improve and breathing gets easier; within a year your risk of heart disease is about half that of a smoker; after 15 years your heart attack risk matches a never-smoker's.
How can I track my own quit smoking timeline?
The free SmokOver app plots this timeline against your personal quit date, counts down to your next milestone in real time, and gives you a collectible card for each one you reach.