Concrete Porch Calculator
Estimate concrete volume, bags, surface area, form perimeter, placed weight and cost for one or more uniform rectangular porch slabs.
Default project preview
1.63 yd³
Concrete bags
74
Porch area
96 ft²
Base volume
1.48 yd³
Form perimeter
40 ft
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Volume = porch length × width × thickness × quantity. The allowance is applied before ready-mix conversion and bag rounding.
FAQ
Concrete Porch Calculator questions
Does this include porch steps?+
No. Estimate steps separately with the concrete steps calculator.
What about thickened edges?+
Add edge beams or footings as separate concrete shapes.
Can a porch slab attach to the house?+
Connection and movement details depend on the structure, soils and climate and require project-specific design.