Estimate Concrete for Pomona Slabs, Driveways, Patios & Footings
Use this Concrete Calculator in Pomona to estimate cubic yards, cubic feet, ready-mix volume, bags and optional material cost for concrete projects in Pomona. 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 Pomona 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 Pomona 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 Pomona depend on the project scope and location. The City of Pomona Building & Safety Division reviews construction plans, issues building permits, provides inspections and enforces building-code requirements, while Public Works Engineering reviews land-development and public-improvement work.
A patio slab, driveway widening, footing, foundation or structural concrete project can follow different approval paths. Pomona's Building Application & Forms page includes general permit applications, residential-addition guidance, grading-permit information and a current "Do I Need a Permit" handout. Always verify the exact scope before ordering concrete.
Pomona's current City ordinance list shows Ordinance No. 4364 adopting the 2025 Edition of the California Building Standards Code. The Building & Safety Division also maintains a Current CA Codes page and a current Building Codes and Design Criteria resource for plan review.
Structural slabs, foundations, additions, retaining elements and new buildings should follow the approved plans and applicable California code requirements together with City amendments and project conditions. A cubic-yard calculator cannot choose slab thickness, footing geometry, reinforcement, structural capacity, seismic design or required inspections.
Pomona Public Works Engineering states that any work within the City's public right-of-way requires a permit. The Engineering Services page provides an Encroachment Permit application and explains that the Land Development group issues permits affecting the public right-of-way, including construction, dry-utility and encroachment permits.
If a driveway approach, sidewalk panel, curb area, pavement restoration or utility-related concrete enters the public right-of-way, calculate that section separately from the private slab. Public-side geometry, restoration, traffic-control and inspection requirements can differ from ordinary private flatwork.
Pomona Engineering reviews building permits, grading plans, public-improvement plans, street work, storm-drain improvements, utilities, easements and offsite improvements. The same Engineering Services page provides Standard Drawings, grading-plan notes, street-improvement notes and stormwater resources.
For driveway, paving or development-related concrete, use this calculator for material takeoff, but use the approved grading or improvement plan and current City standards for actual construction. Drainage, slope, easement conflicts and public infrastructure should be resolved before forms are set.
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 inside the public right-of-way should be measured separately when their dimensions or approval requirements differ. Pomona Engineering requires permits for any work within the City's public right-of-way and reviews street, grading, utility and public-improvement plans.
For estimating, calculate the private driveway, approach, sidewalk panels, curb-related work and pavement restoration as separate sections. For construction, use the approved Pomona encroachment permit, current standard drawing and required inspections for the public portion.
Pomona concrete placements frequently require hot-weather planning. High concrete and ambient temperatures, direct sun, low relative humidity and wind can increase evaporation and shorten the time available for placing and finishing. The concrete supplier and contractor should coordinate mixture temperature, delivery timing, placement sequence and curing for the actual conditions.
A volume calculator cannot compensate for poor hot-weather logistics. For a larger driveway, patio or slab, plan how quickly trucks can discharge, whether a pump or other placement method is needed, and how curing will begin after finishing. Do not change water or admixture dosage without following the approved concrete mixture and supplier instructions.
Pomona Public Works Engineering publishes Standard Drawings and general notes for grading, street improvements, storm drainage, traffic control, water and sewer work. These documents are relevant where private development connects to public streets, sidewalks, utilities or drainage infrastructure.
Use the calculator to estimate cubic yards for each measurable concrete section, but use the current City standard drawing, approved improvement plan and encroachment permit for actual public-right-of-way 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 Pomona.