"You can expect a full 5 lb. CO2 cylinder to last for 8-10 five gallon Cornelius kegs."
Unless you have a leak, then it can be far fewer! :D
FYI: The link above goes to the 15-lb cylinder, which alleges 20-30 five-gallon Corny Kegs.
From my "beer" folder in Inoreader:
A Ph.D. in Beer A Ph.D. in Beer - A Study of Beer and Fermentation Science
American Homebrewers Association How to Brew Beer | Homebrewers Association
BeerSmith Home Brewing Home Brewing Blog by BeerSmith™ - Making Beer at Home
Bootleg Biology Bootleg...
Whenever I see the HBT address in San Marcos TX, I think of San Marcos CA, and then I think about endless delicious sours at Churchill's. Gotta get down there again soon.