How much alcohol/day is equivalent to a half a pack of regular cigarettes/day?

I mean if you go by percentage of alcohol and volume, regardless if it’s beer, wine or hard liquor, what would be the amount? Someone said “I do more damage to myself with….of alcohol, than you with your ½ a pack of cigarettes/day.” What goes in the blank?
What is the amount that makes it that they are doing the same amount of harm to their health?