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`"Area" = pi * ( "r" )^2`

Enter a value for all fields

The **Square Footage of a Circular Slab** calculator * Circular Slab*computes the area(**A**) of a circular slab based on the radius (**r**).

**INSTRUCTIONS:** Choose your units (feet is the default), and enter the following:

- (
**r**) This is the radius (half of the diameter) of your concrete slab.

**Surface Area:** The surface area of the circular slab is returned in square feet. However, this can be automatically converted to other area units (e.g. square meters) via the pull-down menu.

- Cubic Yards of Concrete in a Circular Slab
- Amount of rebar needed in a circular slab
- Surface area of a circular concrete slab
- Perimeter or circumference of a circular concrete slab
- Weight of Concrete in a Circular Slab

- Compute the Weight of a Rectangular Slab
- Compute the amount of rebar needed in a circular slab
- Compute the surface area of a circular concrete slab
- Compute the perimeter or circumference of a circular concrete slab
- Cubic Yards of Concrete in a Slab
- Compute the Weight of a Circular 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