Slabs • Patios • Driveways • Footings • Posts
Use this Concrete Calculator in Reno to estimate cubic feet, cubic yards, concrete bags and material cost for Reno-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 Reno 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 Reno-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 Reno, 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 driveway, patio or walkway slab, calculate length × width × thickness. The City of Reno Code Enforcement page states that ordinary concrete flatwork does not require a permit, but it also notes that a City sidewalk or curb cannot simply be driven over as driveway access.
If the project affects public right-of-way, curb, gutter, sidewalk, trenching, utilities or an access connection, separate Public Works or Development Services requirements can apply. Use this calculator for material quantity, then verify the exact project scope with the City before construction.
Official resources: City of Reno Code Enforcement and Reno Public Works.
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 formulas apply in Downtown Reno, South Reno, Northwest Reno, Damonte Ranch, Somersett, Spanish Springs, Verdi and nearby Washoe County communities in northern Nevada. What changes are supplier pricing, delivery distance, seasonal access, site conditions, 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.
Reno exterior concrete should be planned around drainage, subgrade support, seasonal freezing and thawing, dry air and rapid temperature swings. This calculator estimates concrete material volume only; it does not design frost protection, air entrainment, pavement structure, reinforcement, joints or drainage.
Before ordering ready-mix, verify excavation depth, compacted base, forms, reinforcement and truck or pump access. Uneven subgrade, over-excavation and thickened sections can increase cubic yards even when nominal slab dimensions have not changed.
The City of Reno Development Services Department manages building permits and related plan review. Building-permit applications are submitted electronically through the ONE Regional Licensing and Permitting portal.
For ordinary property flatwork, Reno Code Enforcement states that concrete flatwork itself does not require a permit. Structural foundations, additions, retaining structures and work affecting the public right-of-way can involve separate permitting or engineering review, so verify the exact scope with Development Services or Public Works.
Official resource: Reno Building Permits.
The City of Reno states that the 2024 Building Codes and 2023 National Electrical Code were adopted on July 1, 2025. Applications submitted and accepted before January 1, 2026 could use either the prior 2018 editions or the 2024 editions, provided one consistent code family was used.
Effective January 1, 2026, the City says plans are accepted only under the 2024 building-code editions. Check the current City amendments and project-specific requirements before construction.
This Concrete Calculator in Reno is a material quantity estimator only. It does not determine structural slab thickness, footing size, reinforcement, frost protection, seismic design or code compliance.
Official resource: City of Reno Building Permits — Building Codes and Amendments.
Small repairs and pads may be practical with bagged concrete, while larger slabs, patios and footings can require many bags. The calculator lets you compare approximate bag quantity with ready-mix cubic yards.
Bag yields vary by manufacturer and product. Verify the package yield before purchasing. For larger pours, ready-mix can simplify batching but may include delivery minimums, short-load fees or waiting-time charges.
The exact mathematical quantity assumes uniform thickness, perfect forms and zero placement loss. Real job sites can differ because of uneven base elevations, over-excavation, form tolerance or concrete left in placement equipment.
The calculator's allowance field is optional. Choose the final order based on actual field conditions and supplier guidance.
Concrete is volume, so thickness must be included.
The calculator expects slab thickness in inches and converts it automatically.
Calculate each thickness zone separately.
Add deeper concrete geometry separately.
Enter a current supplier quote instead of relying on an old citywide average.
Check official Reno permitting information for the exact project scope.
The calculator does not select slab thickness, footing size, reinforcement or concrete strength.
Reno's high-desert climate can create both hot-weather and cold-weather placement challenges. Warm afternoons, low relative humidity and wind can increase evaporation and slump loss, while cold nights and freezing conditions can slow strength development and require protection. These conditions do not change the geometric cubic-yard calculation, but they can change delivery, placement, finishing and curing procedures.
For hot-weather work, review ACI PRC-305-20: Guide to Hot Weather Concreting. For cold conditions, review ACI Cold Weather Concrete guidance.
Low humidity and wind can increase surface moisture loss even when temperatures are not extreme. At the same time, Reno's day-to-night temperature changes can create very different conditions between placement and overnight curing. Plan concrete delivery, crew timing and curing around the actual forecast and project specification.
For a calendar-based curing plan, use the Concrete Cure Time Calculator. Weather changes how concrete is handled and protected, not how many cubic yards fit inside the forms.
Ready-mix pricing can vary with mix specification, order size, delivery distance, fuel, short-load charges, waiting time and pump requirements. For that reason, the price-per-yard field is editable instead of using one fixed Reno concrete price.
Enter the current supplier quote to estimate material cost. The result excludes excavation, forms, reinforcement, labor, permits, pumping, testing, finishing and curing.
The mathematical result is accurate when the entered dimensions match the actual formed or excavated geometry. The largest field-estimating errors usually come from incorrect thickness, uneven excavation, irregular shapes, omitted thickened edges or measurement mistakes.
Re-measure installed forms before ordering, calculate irregular sections separately and confirm supplier minimum-load and delivery policies. A practical allowance can help cover normal field variation, but accurate measurement should come first.
Concrete curb, gutter, sidewalk, utility, trenching and other public-right-of-way work should follow approved plans and the applicable City or agency standards rather than residential calculator assumptions. Reno Public Works requires inspections for certain excavation and encroachment permit work, including concrete forms before concrete placement.
For Nevada state transportation work, use the current NDOT Standard Specifications, Standard Plans and Design Guides. NDOT currently publishes 2024 Standard Plans for Road and Bridge Construction on that page.
Concrete quantity comes from finished project dimensions. Weather affects placement and curing procedures, not the basic geometric volume.
Suppose a Reno 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 Reno concrete yards, slabs, patios, driveways, bags, cost and permits.