I quit cigarettes on Monday the 18th February, 2008 at 8:30am.
That means that I have been smoke-free for the last 18 years, 19 weeks, 1 days, 6 hours, 11 minutes, and 26 seconds.

To put it another way, that's: 577,692,686 seconds.
or 9,628,211 minutes.
or 160,470.19 hours.
or 6,686.26 days.
or 955.18 weeks.
or 18.32 years.
or, if you're materialistic, €49,944.80.
or 133,725 unsmoked cigarettes.