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`nb = (pi *( "r" )^2 * d )/(0.6 ft^3)`

Enter a value for all fields

The **Number of 80 pound bags of concreted for a Circular Slab** calculator computes the number of 80 pound bags of concrete needed for a circular slab* Circular Slab *

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

- (
**r**) This is the radius of the slab (half of the diameter) - (
**d**) This is the depth of the slab.

**Number of Bags (nb): **The calculator returns the number of 80 lb bags needed to fill the volume of the circular slab.

- Cubic Yards of Concrete in a Slab
- 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 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
- Compute the amount of rebar needed in a circular slab
- Compute the surface area of a circular concrete slab, CLICK HERE.
- Compute the perimeter or circumference of a circular concrete slab, CLICK HERE.