First off, once the wort is fermented it becomes beer
The general rule of thumb for priming is .75-1oz of corn sugar per finished gallon of beer. 21.3-28.3 grams.
The best way to do this is by weight, not by volume so get a small kitchen scale to be accurate.
Then, read this: http://www.homebrewtalk.com/f35/bott...ebrewer-94812/