The Water Needed for Concrete formula computes the volume of water needed for a volume (V) of concrete.
INSTRUCTIONS: Choose units and enter the following:
Water for Concrete (Wtr): The calculator returns the volume of water in gallons. However, this can be automatically converted to compatible units via the pull-down menu.
Concrete mix requires about 3.5 quarts per 80 lb bag (0.6 cubic feet). That's a volume ratio of 0.194950810185185 real
The formula for Water needed for Concrete is:
Wtr = V*CWR