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`nb = ( L * W * D )/ (0.45 ft^3)`

Enter a value for all fields

The **60lb bags of Concrete in a Slab** calculator computes the number of 60 pound bags of concrete needed for a rectangle (square) slab, footer, sidewalk, driveway or curb.

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

- (
**L**) Length of Slab - (
**W**) Width of Slab - (
**D**) Depth of Slab

**60 pound bags of Concrete (nb):** The calculator returns the number of 60lb bags needed for the slab. It also returns the volume of concrete in cubic yards, and the length of the form boards needed.

- nb - Number of 60lb bags of concrete
- V - Total Volume of Concrete
- FB - Length of the Form Boards

The volume of an 60lb bag of concrete is approximately 0.45 ft^{3}. This calculator computes the volume of the slab in cubic feet and then divides by the cubic feet in an 60lb bag.

`nb = (L*W*D) / (0.45 ft^3)`

where:

- nb = number of 60lb bags
- L = length of slab
- W = width of slab
- D = depth of slab

- Date: 7/6/21
- Store: Lowes
- Manufacturer: Sakrete

Note: this is a random survey of concrete prices on the Internet. The most common prices are found on the websites of major DIY retailers including Home Depot, Lowe's and Menards.

**Cubic Yards in a Rectangle Slab:**This computes the volume of concrete in a rectangular shaped slab.**Volume of a Polygon Slab****Square Feet of a Rectangle Slab:**This computes the surface area of rectangular shaped slab.**Length of Rebar in a Rectangle Slab:**Computes the length of rebar in a rectangular shaped slab.**Weight of Rebar in a Rectangle Slab:**Computes the weight of rebar in a rectangular shaped slab.**Weight of Concrete by Cubic Yards:**This computes the weight of any volume of concrete.**Weight of Concrete and Rebar in a Slab**

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- Number of 40lb bags needed for a Circular Slab
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