Slabs • Patios • Driveways • Footings • Posts
Use this Concrete Calculator in Baton Rouge to estimate cubic feet, cubic yards, concrete bags and material cost for Baton Rouge-area slabs, patios, driveways, sidewalks, footings, posts and other concrete projects. Enter your actual dimensions and local material price for a project-specific estimate.
Estimate slabs and patios, continuous footings, round posts/columns, or convert known square footage into bags and ready-mix cost.
Enter finished dimensions for a patio, driveway panel, garage slab, sidewalk section or other rectangular concrete flatwork.
Verify manufacturer bag yield.
Thickened edges, footings, steps and other deeper concrete sections should be calculated separately.
Estimate a uniform continuous footing, grade beam or strip foundation.
Estimate concrete for cylindrical posts, piers and round columns.
Already know the square footage? Convert area and slab thickness into cubic yards, bag quantity and material cost.
The calculator works from geometry, so the first step is measuring the actual concrete dimensions. For a slab, patio or driveway panel, measure finished length and width and enter the planned slab thickness. For a footing, measure total continuous length and use the actual width and depth from the project design. For posts or piers, use the finished diameter and poured height/depth.
After calculating exact volume, compare it with an optional allowance. The allowance is not a mandatory Baton Rouge percentage—it simply gives you a larger planning quantity to compare against the mathematical volume.
Use finished concrete dimensions.
Slab, footing, round post or area.
Use the project-specific concrete thickness.
Enter an Baton Rouge-area supplier quote if desired.
Check permits, plans and field dimensions.
For most rectangular slabs, the concrete quantity formula is straightforward.
Cubic yards = cubic feet ÷ 27.
A 20 × 20 foot slab at 4 inches thick contains about 133.33 cubic feet, or approximately 4.94 cubic yards before an ordering allowance.
| Project | Example Size | Thickness | Approx. Concrete |
|---|---|---|---|
| Small Patio | 10 × 12 ft | 4 in | 1.48 yd³ |
| Patio / Slab | 12 × 20 ft | 4 in | 2.96 yd³ |
| Garage Floor | 20 × 20 ft | 4 in | 4.94 yd³ |
| Driveway Section | 20 × 30 ft | 5 in | 9.26 yd³ |
| Large Slab | 30 × 40 ft | 6 in | 22.22 yd³ |
These are geometric examples only. Actual thickness, reinforcement, base preparation and project design can differ.
Location-focused guidance without forcing a single local price.
Calculations use project dimensions rather than broad averages.
Compare bagged concrete for smaller pours.
Estimate cubic yards before requesting a supplier quote.
Slabs are among the most common concrete projects in Central Baton Rouge, including patios, garage floors, sheds, equipment pads and other flatwork. The slab calculator converts the surface footprint and thickness into concrete volume.
Do not use excavation depth as slab thickness. Excavation can also contain compacted base, drainage layers or other materials. Enter the actual concrete thickness shown on the project plan.
For a dedicated slab page, use the Concrete Slab Calculator. For floor-specific work, use the Concrete Floor Calculator.
For a rectangular patio, multiply length by width to get square footage, then multiply by slab thickness. Irregular patios can be divided into rectangles, circles or other simple shapes and calculated separately.
Use the Concrete Patio Calculator for circular and L-shaped patio geometry.
For a private driveway, patio or walkway slab, calculate length × width × thickness. If work includes a new driveway, driveway expansion or replacement, local permit requirements apply in East Baton Rouge Parish.
The City-Parish residential permit guidance specifically lists driveway additions or expansions as work requiring a permit, and its Understanding Permit Requirements document also lists new driveways, driveway expansion and driveway replacement.
Official resources: East Baton Rouge Residential Permit Guidance and Understanding Permit Requirements.
Continuous strip footings and grade beams are calculated from total length × width × depth. The calculator does not size a footing structurally. Soil conditions, loads, building type and code requirements can affect foundation design, so use dimensions from approved plans or qualified design guidance.
For more detail, use the Concrete Footing Calculator or Concrete Foundation Wall Calculator.
Round concrete posts and piers use the cylinder formula π × radius² × height. If the project includes an enlarged footing at the bottom, calculate that footing separately. For larger structural columns, use the Concrete Column Calculator.
Concrete prices can change by supplier, mix specification, delivery distance, order size and additional service charges. Rather than hard-coding a citywide price, the calculator lets you enter a current local quote per cubic yard.
For sealer quantities after the project is ready for treatment, use the Concrete Sealer Coverage Calculator.
The same cubic-yard equations apply in Downtown Baton Rouge, Mid City, Southdowns, Broadmoor, Shenandoah, Bluebonnet, Gardere and other East Baton Rouge Parish communities. What changes are supplier pricing, delivery distance, access, permit requirements, drainage conditions and actual field dimensions.
Use this page for quantity planning, then confirm mix specifications, delivery timing, permit requirements and construction details with the appropriate contractor, supplier, engineer and City-Parish department.
The City of Baton Rouge and Parish of East Baton Rouge Permits & Inspections Division handles plan review, permitting, code inspections and enforcement for residential and commercial improvements. The current City-Parish code language adopts the most recent editions of the IBC, IRC and IEBC as adopted and amended by the Louisiana State Uniform Construction Code Council.
Current City-Parish documents and permit materials reference the 2021 IRC and IBC framework. For the exact project, verify the currently adopted Louisiana State Uniform Construction Code Council editions and local amendments before construction.
Official resource: Baton Rouge Permits & Inspections.
This Concrete Calculator in Baton Rouge is a material quantity estimator only. It does not determine slab thickness, footing size, reinforcement, structural capacity or code compliance.
Baton Rouge concrete placement frequently occurs in hot, humid Gulf Coast weather. High concrete temperature, direct sun and wind can increase slump loss and surface evaporation, while sudden rain can disrupt finishing and curing. The quantity calculation itself does not change, but delivery timing, crew coordination, evaporation control and curing can become more important.
Use ACI PRC-305-20 and NRMCA CIP 12 for hot-weather guidance, and follow the concrete supplier and project specification for actual placement decisions.
For warm-season placement, review ACI PRC-305-20 and NRMCA CIP 12. These resources address batching, transport, evaporation, placement, finishing and curing considerations that can matter during Baton Rouge heat and humidity.
Concrete streets, curbs, sidewalks, drainage structures and other public improvements should follow the applicable City-Parish or agency plans and specifications rather than residential calculator assumptions. Baton Rouge Traffic Engineering also requires construction permits for road or lane closures associated with work such as deliveries, curb cuts and utility repairs.
For Louisiana state transportation work, use the Louisiana DOTD Standard Specifications. The 2026 Louisiana Standard Specifications for Roads and Bridges became effective January 1, 2026.
The same cubic-yard formulas apply in Downtown Baton Rouge, Mid City, Southdowns, Broadmoor, Shenandoah, Bluebonnet and other East Baton Rouge Parish communities. What changes are supplier pricing, delivery distance, site access, permit requirements and actual field dimensions.
Use this page for quantity planning, then confirm mix specifications, delivery timing, permit requirements and construction details with the appropriate contractor, supplier, engineer and City department.
The mathematical volume is accurate when the entered dimensions match the actual formed or excavated geometry. The biggest estimating errors usually come from incorrect thickness, irregular shapes, low areas, uneven excavation or omitted thickened sections.
Re-measure installed forms immediately before ordering, calculate irregular sections separately and confirm the supplier's minimum-load and delivery policies. A practical allowance can help cover ordinary field variation, but accurate measurement should come first.
Use the Slab / Patio mode for patios, garage floors, walkways and driveway sections. Use the Footing / Grade Beam mode for continuous foundation elements, and the Round Post / Column mode for cylindrical posts or piers. When a project includes several shapes, calculate each one separately and combine the final cubic-yard quantities.
For larger pours, use the Concrete Truck Count Calculator to estimate truckloads. If pumping is planned, use the Concrete Pump Capacity Calculator to compare placement needs.
Warm, sunny and windy conditions can increase surface evaporation even when the concrete volume itself does not change. Organize delivery timing, crew size, placement method and curing before the first truck arrives. Protect fresh surfaces according to the project specification and concrete supplier recommendations.
For technical hot-weather guidance, use ACI PRC-305-20 and NRMCA CIP 12. For calendar planning, use the Concrete Cure Time Calculator.
Ready-mix pricing can vary with mix specification, order size, delivery distance, fuel, short-load fees, waiting time and pump requirements. For that reason, the cost field is editable instead of using one assumed Baton Rouge price.
Enter the current price per cubic yard from the supplier you plan to use. The calculator estimates concrete material only and excludes excavation, forms, reinforcement, labor, pumping, permits, testing, finishing and curing.
Concrete quantity comes from finished project dimensions. Weather affects placement and curing procedures, not the basic geometric volume.
Suppose a Baton Rouge residential slab is 12 feet by 20 feet and 4 inches thick. The area is 240 square feet, and the thickness is one-third of a foot.
With a 10% planning allowance, the calculator shows about 3.26 cubic yards.
Common questions about Baton Rouge concrete yards, slabs, patios, driveways, bags, cost and permits.