wrote:
This is my first crack at concrete. Small job and I figure I'll need a
bit over 1.5 cubic feet, and I'm planning to do the work this afternoon.
....
I read the instructions on the bag of Quickcrete (60 lb.) I bought, and
it says to use 4 quarts of water with it, maximum 5 quarts. There's no
mention of how many cubic feet (or inches, I figure a cubic foot is 1725
cubic inches) I can expect to get out of a 60 lb. bag. I don't want to
mix much more than I'll need, and figure a sure don't want to mix less.
How do I determine how much to mix?

http://www.quikrete.com/Calculator/Main.asp

A 60-lb bag will make just under 0.5 cu-ft, an 80 about 0.6. It's
printed on the bags somewhere, I'm sure.

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