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`Bags = ( "V" )/(uV("80 lb bag")`

Enter a value for all fields

The **Concrete by 80lb Bag** calculator computes the number of 80 pound bags of concrete and volume of water needed to mix a volume (**V**) of concrete.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**V**) Volume of Concrete

**80 lb Bags (n):** The calculator returns the number of 80 lb bags needed and the water requirement in gallons. However, this can be automatically converted to compatible units via the pull-down menu.

- Cubic Yards of Concrete in a Slab
- Water Needed for Concrete
- How many 40lb bags of concrete for so many cubic yards of concrete.
- How many 60lb bags of concrete for so many cubic yards of concrete.
- How many 80lb bags of concrete for so many cubic yards of concrete.
- Price of a 40lb bag of concrete.
- Price of a 60lb bag of concrete.
- Price of a 80lb bag of concrete.
- How many 40lb bags of concrete needed for a slab.
- How many 60lb bags of concrete needed for a slab.
- How many 40lb bags of concrete needed for a slab.
- How many 80lb bags of concrete needed for a slab.
- Cubic Feet of Concrete in a 40lb bag.
- Cubic Feet of Concrete in a 60lb bag.
- Cubic Feet of Concrete in a 80lb bag.
- Cubic Yards of Concrete in a Circular Slab.
- Number of 40lb bags needed for a Circular Slab
- Number of 60lb bags needed for a Circular Slab
- Number of 80lb bags needed for a Circular Slab