Plan Aurora Concrete Quantity Before You Order
Use this Concrete Calculator in Aurora, CO to estimate concrete for slabs, patios, driveways, sidewalks, footings, piers, walls and curbs. Calculate cubic yards, cubic feet, cubic meters, approximate concrete bags and optional ready-mix material cost before contacting a local supplier.
Choose the shape that best matches your project and enter actual finished dimensions.
Estimate concrete for rectangular patios, pads, floors and similar slab-on-ground projects.
Material estimate only. Verify thickness, reinforcement, base, joints, drainage, permits and structural requirements separately.
Estimate rectangular driveway, sidewalk, walkway or replacement-panel concrete.
If work touches the public right-of-way, verify Aurora permits, standard plans and inspection requirements before starting.
Choose a continuous rectangular footing or a round pier / post footing.
Volume only. Footing dimensions, reinforcement, soil bearing, structural design and structural compliance require project-specific design.
Estimate linear wall, stem wall, curb or similar rectangular concrete sections.
Material volume only. Verify wall, retaining, curb and right-of-way requirements before construction.
Convert project dimensions into the standard ready-mix ordering unit.
Approximate 40, 60 and 80 lb bag quantities for smaller Aurora projects.
Use a local supplier quote and plan truck access before placement day.
Check Aurora permits and standard plans when work affects regulated construction or public right-of-way.
A Concrete Calculator in Aurora helps homeowners, contractors, estimators and property managers turn project dimensions into a practical material quantity. Whether the work is a backyard patio, residential driveway, sidewalk replacement, garage slab, footing, pier, retaining-wall footing or curb section, the starting point is concrete volume.
This Aurora concrete calculator supports several common shapes because local projects are not all simple slabs. The Slab & Patio calculator handles rectangular flatwork. Driveway & Sidewalk is optimized for longer rectangular pours. Footing & Pier switches between a continuous footing and round pier geometry. Wall & Curb calculates long rectangular concrete sections.
The result shows exact mathematical volume and an adjusted planning quantity after the user-selected extra percentage. It also converts the order into cubic feet, cubic yards and cubic meters, estimates common bag quantities, and can multiply the cubic-yard quantity by a price entered from a local ready-mix quote.
The quantity depends entirely on finished dimensions and thickness. A concrete slab is calculated by multiplying length × width × thickness after putting every measurement into compatible units. Since ready-mix concrete in the United States is normally discussed in cubic yards, cubic feet are divided by 27.
Cubic yards = cubic feet ÷ 27.
A 20 ft × 12 ft patio that is 4 inches thick contains 80 cubic feet of concrete mathematically. That is about 2.96 cubic yards before any extra allowance. The calculator then applies the percentage you enter to create a planning order quantity.
Do not confuse square footage with concrete volume. Square feet describe surface area; concrete orders also require thickness. A 240-square-foot slab at 4 inches thick requires substantially less concrete than the same 240-square-foot slab at 6 inches thick.
Aurora concrete quantity planning can cover patios, garage slabs, driveway sections, sidewalks, shed and equipment pads, footings, piers, foundation walls, retaining-wall footings, curb work and commercial site concrete. Projects range from small residential improvements to large private-development and public-infrastructure work across the Denver metro area, so the estimate should always use the actual project dimensions.
Concrete quantity is only one part of a compliant construction project. The City of Aurora Building Division provides permit, plan-review and inspection services for construction within City jurisdiction.
The City's current Adopted Building Codes page lists the 2021 International Building Code, 2021 International Residential Code, 2021 International Mechanical Code, 2021 International Fuel Gas Code, 2021 International Fire Code, 2021 International Plumbing Code, 2021 International Existing Building Code and 2021 International Energy Conservation Code among Aurora's adopted codes.
Use the official Aurora Adopted Building Codes and Building Permits pages to verify the current requirements for your project.
If concrete work affects sidewalks, curb, paving, drainage or another improvement within public right-of-way, the cubic-yard calculation should be paired with Aurora Engineering requirements. The City publishes engineering design standards for infrastructure and development work.
Aurora's Engineering Design Standards page states that materials used in the public right-of-way must be approved before use and that unapproved materials are subject to rejection. The City also publishes roadway design and construction criteria, standard details and civil-plan review resources.
Review the official Aurora Engineering Design Standards, Design Standards and Engineering Division pages before beginning applicable public-infrastructure work.
For a basic rectangular patio, measure the finished length and width inside the forms and enter the planned thickness. If the patio is L-shaped, divide it into rectangles, calculate each section and add the volumes. If it contains a circular section, use the Round Concrete Slab Calculator.
Before placing concrete, verify grading and drainage. A material calculator cannot tell you where runoff should go or whether a patio elevation conflicts with doors, vents, weep screeds, property drainage or other building details.
For a pool-area project, use the Concrete Pool Deck Calculator. For a tapered transition, use the Concrete Wedge Calculator.
A driveway quantity estimate needs length, width and thickness. If the driveway changes width, calculate separate sections rather than using one rough dimension. Thickened edges, aprons, curb transitions or replacement panels should also be calculated separately if their geometry differs.
Do not use this page to select driveway thickness or reinforcing. Vehicle loading, base conditions, jointing, site drainage, project plans and public-works details can all matter. If the work reaches the city sidewalk, curb or street interface, confirm the applicable City of Aurora requirements before demolition or placement.
For joint planning after the dimensions are known, use the Concrete Joint Spacing Calculator and Concrete Saw Cut Calculator.
Continuous footings use rectangular volume. The calculator converts footing width and depth from inches into feet, multiplies them by length and then converts the result to cubic yards.
Round piers use cylinder geometry. Their volume equals π × radius² × depth × quantity. Enter the actual diameter and depth shown on the project design rather than choosing a size from the calculator.
Diameter must be divided by two to obtain radius.
For preliminary footing geometry calculations, use the Concrete Footing Size Calculator. For reinforcing placement, see the Concrete Cover Calculator and Concrete Rebar Spacing Calculator.
Aurora's Building Division provides online permit and inspection services, while the Engineering Division uses the City's development portal for civil-plan applications and review. The Engineering page notes that the customer portal moved to DevPortal.AuroraGov.org in July 2025.
For concrete estimating, use final approved geometry rather than early design sketches. Recalculate whenever slab thickness, footing width, curb geometry, sidewalk section or site-paving dimensions change during review.
The Engineering Division reviews and approves construction plans and reports for new subdivisions, commercial site plans and capital-improvement projects, so project-specific civil drawings should control the quantity entered into this calculator.
Concrete prices are not hard-coded into this calculator because Aurora-area ready-mix rates, haul distance, delivery zones, minimum-load policies, fuel charges, mix specifications, waiting time and pumping can change. Enter the price per cubic yard from a current local supplier quote to calculate a simple material estimate.
The resulting cost covers only the entered cubic-yard rate. It does not automatically include labor, reinforcement, forms, base material, demolition, haul-off, pumping, line-pump setup, short-load charges, permits, inspections, finishing or curing.
For delivery logistics, use the Concrete Delivery Distance Calculator. For placement duration, use the Concrete Pour Time Calculator.
Small repairs and pads may be practical with bagged concrete. Large patios, driveways and foundation pours can require many bags, which increases handling and mixer-cycle time. The calculator provides approximate counts for 40 lb, 60 lb and 80 lb bags using typical planning yields, but the actual bag yield printed by the manufacturer should control purchasing.
If a project needs many mixer batches, use the Concrete Mixer Size Calculator to compare mixer capacity and approximate batch count. For ready-mix work, coordinate delivery rate with your crew and placement method so concrete does not arrive faster than it can be handled.
Aurora concrete placement can involve strong sun, low humidity, wind, large day-to-night temperature swings and winter freezing conditions. Weather should be checked for the actual project date because seasonal averages cannot predict the jobsite conditions.
Use the Concrete Hot Weather Calculator for warm-weather planning and the Concrete Cold Weather Calculator when low temperatures or freezing conditions are a concern. Actual placement, protection, finishing and curing procedures should follow the ready-mix supplier, project specifications and applicable professional guidance.
Concrete requires a thickness dimension. Square footage alone cannot determine cubic yards.
A 4-inch slab is 0.3333 foot thick, not 4 feet.
Turn-down edges, footings, curbs and thickened strips can add significant volume beyond the main slab.
Excavation and forming can change project dimensions. Calculate from final geometry before ordering when possible.
The volume estimate does not authorize construction or determine code compliance.
| Project | Dimensions | Exact Volume | Before Extra Allowance |
|---|---|---|---|
| Small Patio | 10 × 10 ft × 4 in | 33.33 ft³ | 1.23 yd³ |
| Patio | 20 × 12 ft × 4 in | 80.00 ft³ | 2.96 yd³ |
| Walkway | 40 × 4 ft × 4 in | 53.33 ft³ | 1.98 yd³ |
| Driveway Section | 30 × 12 ft × 5 in | 150.00 ft³ | 5.56 yd³ |
| Garage Slab | 20 × 20 ft × 4 in | 133.33 ft³ | 4.94 yd³ |
These examples are mathematical references only. Calculate your actual dimensions and project thickness.
Aurora's Building Permit Center handles building permits and public-improvement permits, while the City's Building Division coordinates plan review and construction inspections. After a permit is issued, inspections are required at specified stages so the work can be checked against the adopted building code, ordinances and approved plans.
The City states that access must be provided before work is covered and that approved plans and permit documents must be available at the jobsite during inspection. For concrete projects, verify whether footing, foundation, reinforcing or other pre-pour inspections are required before placement conceals the work.
Use the official Aurora Permits and Inspections & Certificate of Occupancy pages for current workflow information.
Aurora Engineering publishes standard engineering details, general notes, drainage criteria and private-development plan-review resources. The City's Civil Engineering Plan Submittal Process requires site-specific civil plans to include paving and City standard detail sheets where applicable.
The City states that work and materials must comply with Aurora Construction Standards and Specifications and NCTCOG Public Works Construction Standards, with Aurora standards taking precedence if the two publications conflict.
For a concrete estimate, this means the quantity should be calculated from the actual section required by the approved plan or City detail—not from a generic thickness assumption.
See the official Civil Engineering Plan Submittal Process and Standard Details and Resources.
The City of Aurora maintains design standards in multiple disciplines and states that they establish minimum acceptable criteria for improvements within the City. The City also cautions that these standards are updated regularly, so applicants should check for revisions before submitting plans.
For public-right-of-way and development work, Aurora Engineering publishes roadway design and construction specifications, approved materials information, civil-plan checklists and other design criteria. These technical documents can affect concrete section thickness, curb geometry, paving details and material selection.
When a City standard or approved civil plan applies, calculate concrete from that required geometry rather than from a generic example.
Official references: Aurora Design Standards and Aurora Engineering.
Use the Concrete Volume Calculator for general geometry, the Round Concrete Slab Calculator for circular pads, and the Concrete Cubic Yard Calculator for direct yard conversions.
For reinforcing, see the Concrete Rebar Calculator, Concrete Rebar Spacing Calculator and Concrete Cover Calculator. For scheduling and logistics, use the Concrete Pour Time Calculator and Concrete Delivery Distance Calculator.
Measure final dimensions, convert them to volume, plan delivery access and verify City requirements where applicable.
Common questions about concrete yards, bags, local permits and Aurora project planning.