• Light: < 10 cigarettes per day
  • Heavy: > 25 cigarettes a day
  • Chippers: Very light smokers (< 5 cigarettes a day) who regularly use tobacco without developing dependence
  • Light and intermittent smokers: 1-39 cigarettes per week, or an average of 10 cigarettes per day or 1-4 grams of tobacco per day and have never smoked daily.
  • Low-level smokers: < 20 cigarettes per day and < 1 pack per week
  • Low-rate smokers: < 5 cigarettes per day and never more than 10 cigarettes per day
  • Non-daily smokers: smoke < 7 days per week and may smoke < 3 packs per week
  • Occasional smokers: < 5 cigarettes per day and smoke < 3 times per week, usually dependent on circumstances such as partying or drinking or after meals
  • Social smokers: < 5 cigarettes per day and < 7 days per week in last two years and have never exceeded that limit.