Concrete Patio Calculator
Estimate concrete volume, full bags, surface area, perimeter, placed weight and cost for a rectangular patio slab.
Default project preview
2.61 yd³
Concrete bags
118
Base volume
2.37 yd³
Patio area
192 ft²
Form perimeter
56 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 = length × width × slab thickness. Order volume applies the allowance before conversion to ready-mix units or full concrete bags.
FAQ
Concrete Patio Calculator questions
Should a patio slope away from the building?+
Outdoor slabs commonly need positive drainage, but the required slope and finished elevations depend on the site and local requirements.
Does this include a gravel base?+
No. Base aggregate, excavation and compaction should be estimated separately.
Are control joints included?+
No. Joint layout depends on slab geometry, thickness and construction details.