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`M = pi *( "r" )^2 * D * 2400 `

Enter a value for all fields

The **Mass or Weight of a Circular Slab** calculator computes mass of a circular slab of concrete based on the radius, depth and the mean density of concrete.

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

- (
**r**) Radius of Slab (half of the diameter) - (
**d**) Depth of Slab - (
**mD**) Density of Concrete (default 2400 kg/`m^3`)

**Mass of Concrete (M): **The weight of concrete is returned in pounds (lbs). However, this can be automatically converted to compatible units (e.g. tons, kilograms) 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
- Cubic Yards in a Semi-Circle Slab
- Weight of a Semi-Circle 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