The Volume of Concrete in a Slab calculator computes the volume of concrete in a rectangle (square) slab. The value is function of the surface area (length * width), and the depth.
INSTRUCTIONS: Choose units and enter the following:
- (L) Length of the slab
- (W) Width of the slab
- (D) Depth of the slab
Volume of Concrete (V): The calculator returns:
- V - Volume of concrete in cubic yards, and the equivalent volume in number of:
- 40lb bags
- 60lb bags
- 80lb bags
- A - Surface Area of the slab in square feet.
- Wtr - Water needed for concrete in gallons
- FB - Length of the form boards in feet.
However, these can be automatically changed to compatible units via the pull-down menu.
The Math / Science
The Volume of Concrete in a Slab calculator compute the volume (3 dimensional space) of a concrete slab through the following equation:
V = L ⋅ W ⋅ D
where:
- V = volume
- L = Length of Slab
- W = Width of Slab
- D = Depth of Slab
The calculator converts the parameters into feet and computes the volume in cubic feet. It then uses the cubic feet to return volume in cubic yards for bulk concrete delivery, and divides it by the volume of the different sizes of concrete in bags. The most common are 40lb, 60lb and 80lb bags.
Masonry Calculators:
- Cubic Yards in a Rectangle Slab: This computes the volume of concrete in a rectangular shaped slab.
- Volume of a Polygon Slab: This computes the volume of concrete in a polygon shaped slab (e.g., pentagon or octagon)
- 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
Bags of Concrete Calculators and Constants
- 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