Half a tsp of sugar per pint or if you want to batch prime 80 - 100 grams for 40 pints, should be done after a couple of weeks but i would recommend leaving for at least 4. But it will leave sediment on the bottom of the bottles, so not good if the reason for bottling from a keg was to take to a party. I bottle from my kegs into 2lt pop bottles, and use a carbonater cap (pop bottle lid with tyre valve) and fizz it up with a co2 tank. Been pretty handy in this hot weather, just wish i had space for a big keezer.