Estimate Concrete for New Orleans Slabs, Driveways, Patios & Footings
Use this Concrete Calculator in New Orleans to estimate cubic yards, cubic feet, ready-mix volume, bags and optional material cost for concrete projects in New Orleans. Calculate rectangular slabs, patios and driveways, continuous footings, round pads and piers, or convert a known volume into bags and truck-load planning.
Calculate slabs and driveways, continuous footings, round pads/piers, or convert known concrete volume into bags and ready-mix planning quantities.
Estimate concrete for a rectangular slab using length, width, thickness and allowance.
Quantity estimate only. Slab thickness, reinforcement, base preparation, joints, drainage and concrete specification must match the actual New Orleans project requirements.
Estimate rectangular footing or grade-beam concrete from continuous length, width and depth.
Estimate cylindrical concrete volume from diameter, depth/thickness and quantity.
Start with known concrete volume and estimate bags, ready-mix truck equivalents and optional cost.
Verify the exact bag's published yield
Start by choosing the geometry that matches the concrete you plan to place. A patio, driveway section or slab is usually calculated as a rectangular prism. A continuous footing or grade beam is calculated from length, width and depth. A round pier or pad uses the cylinder formula. If a contractor or supplier already gave you a volume, use the bags and ready-mix mode to convert that volume into ordering quantities.
The calculator first determines exact geometric volume. It then applies the selected planning allowance. The allowance is not a structural design factor; it simply helps account for uneven grade, form variation, small spills and the fact that actual field dimensions rarely match perfect geometry.
Use the average concrete thickness actually intended for the placement.
Calculate stepped or varying footing sections separately when dimensions change.
Diameter and depth are converted from inches to feet before calculating cubic yards.
Estimate concrete volume for rectangular driveway sections and extensions.
Calculate backyard patios, shed slabs, equipment pads and general flatwork.
Estimate continuous concrete for additions, walls and foundation elements.
Convert adjusted cubic yards into editable truck-equivalent and cost estimates.
For most residential flatwork, the key inputs are length, width and average thickness. A 20 ft × 12 ft slab contains 240 square feet. At 4 inches thick, the exact volume is 80 cubic feet or about 2.96 cubic yards. With a 10% planning allowance, the calculator shows approximately 3.26 cubic yards.
That same formula can be used for a New Orleans patio, walkway section, concrete pad or a rectangular driveway panel. If the project has several areas with different thicknesses, calculate each area separately and add the adjusted results rather than forcing one average thickness across the entire job.
Driveways often contain multiple geometric sections: the main parking area, a narrower approach, flared corners or an extension beside an existing driveway. Divide the layout into rectangles, calculate each one and add the cubic yards. This produces a more reliable takeoff than multiplying the longest overall length by the widest overall width.
Do not let an online material calculator choose driveway thickness or reinforcement for you. Those details depend on vehicle loading, subgrade, base, drainage, joints, existing conditions, project design and any local requirements that apply to the work.
A backyard patio is usually straightforward to measure, but small dimensional errors can still change the order. Measure the formed dimensions after layout when possible. If the patio has a step, thickened edge, footing for a cover or isolated equipment pad, calculate those volumes separately.
For decorative concrete, stamped concrete or exposed-aggregate work, the volume formula stays the same. Decorative finish does not reduce the quantity of base concrete required.
The footing mode converts continuous length, width and depth into cubic yards. For example, 100 linear feet of footing that is 18 inches wide and 12 inches deep contains 150 cubic feet, or about 5.56 cubic yards before allowance.
Actual foundation dimensions should come from the approved project documents where required. Do not use a calculator to choose footing width, depth, reinforcement or bearing requirements.
Round piers are calculated as cylinders. A 24-inch-diameter pier has a radius of 1 foot. If it is 36 inches deep, one pier contains π × 1² × 3 = about 9.42 cubic feet, or roughly 0.35 cubic yard before allowance. Multiple identical piers are multiplied by the entered quantity.
This mode can also be used for round equipment pads, sign bases or other cylindrical concrete elements when the geometry is reasonably uniform.
Perfect geometric volume assumes perfectly shaped excavation, perfectly straight forms and no material loss. Real placements can differ. Many estimators add a modest project allowance and then coordinate the final order with the ready-mix supplier.
This calculator provides 0%, 5%, 10%, 15% and 20% options. The appropriate amount depends on the certainty of the dimensions, excavation quality, project size and ordering increments. A large arbitrary allowance is not automatically better because excess ready-mix can create disposal and cost problems.
Bagged concrete can be practical for small repairs, isolated posts, tiny pads or projects where a ready-mix truck cannot access the placement. Bag yield varies by product and bag size, so the calculator keeps yield per bag editable.
Ready-mix is usually easier to plan for larger placements. The usable truck capacity field is editable because truck payload and supplier policies can differ.
Concrete permit requirements in New Orleans depend on the project. The City states that a Driveway or Curb Cut Permit is required when installing, replacing or repairing a driveway that connects to a public street. The application is reviewed by the Department of Public Works and includes site-plan, existing-condition and drainage information where applicable.
The City also requires a Sidewalk Repair Permit to repair or replace a sidewalk located in the public right-of-way. Additional approvals can apply in areas such as the Vieux Carré, Downtown Development District or locations under Parks & Parkways review. Private flatwork that does not affect the public right-of-way can have a different approval path, so check the current One Stop and Safety & Permits requirements for the exact property.
For new buildings and structural construction, the City of New Orleans requires plan review for compliance with the City's amendments to the International Building Code and zoning rules. The City's new-construction guidance requires foundation drawings where applicable, and other agency approvals can be triggered by historic-district, zoning or project-specific conditions.
The City's current inspection guidance states that a slab/foundation inspection is required when foundation work is part of the permitted scope. The inspection should occur after forms and reinforcing steel are in place but before the concrete is poured. This calculator estimates volume only; approved foundation dimensions, reinforcement, elevations and inspection timing must come from the project documents and permit requirements.
Concrete work in New Orleans should be planned with drainage and finished elevations in mind. A driveway, patio or slab that changes surface runoff can affect adjacent property, sidewalks, catch basins or the public right-of-way. The City's driveway permit process specifically asks for drainage or slope details when applicable, and complete permit applications can require flood-protection review depending on the project.
Because site elevation, soils, groundwater and foundation conditions can vary substantially, do not use a cubic-yard calculator to select foundation depth, slab elevation or structural support. Structural and foundation work should follow approved plans and any geotechnical, survey, flood-protection or code requirements that apply to the property.
The New Orleans Department of Public Works publishes design-engineering documents, general specifications and standard drawings for work in the public right-of-way. The City's standard drawings include driveway, curb-ramp, roadway and sidewalk details used for street construction. These requirements are especially important when a project connects private concrete to a public street, sidewalk or curb.
Material quantity is only one part of compliance. Dimensions, slopes, accessibility, joints, curb geometry, restoration limits and inspections can be governed by the approved detail. Always use the current DPW requirements for public-right-of-way work.
Concrete quantity should be based on the finished form and excavation geometry. Low spots increase concrete volume; high spots can reduce thickness. Proper base and drainage design also matter for performance, especially around driveways, patios and areas adjacent to buildings.
Measure after forms are set when possible. If the subgrade varies significantly, use field measurements or break the project into sections. Avoid assuming that every point beneath a slab is exactly the same depth.
A private driveway slab and the portion that connects to the public street should not be treated as the same permitting problem. The City of New Orleans requires a driveway or curb cut permit for driveway work connecting to a public street. For sidewalk replacement in the public right-of-way, a sidewalk repair permit is required.
When measuring concrete for these areas, calculate each geometry separately. The driveway apron, curb transition, sidewalk panel and private parking slab can have different dimensions, slopes and construction details. Use City-approved drawings for the public portion and the project design for private work.
Measure the slab, footing or pier geometry, calculate exact cubic yards, then apply a realistic ordering allowance.
Common questions about cubic yards, driveways, patios, footings, bags, ready-mix and concrete planning in New Orleans.