Slabs • Patios • Driveways • Footings • Posts
Use this Concrete Calculator in Minneapolis to estimate cubic feet, cubic yards, concrete bags and material cost for Minneapolis-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 Minneapolis 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 Minneapolis-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 Minneapolis, 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.
A driveway estimate should be based on the actual driveway footprint and the specified thickness. If different driveway sections have different thicknesses, calculate each section separately and add the cubic-yard quantities.
Permit, right-of-way and driveway-access requirements can vary by city, county and road authority. Check the local building or engineering department for the property before construction. For statewide building-code information, use the Minneapolis Department of Commerce Building Codes page.
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.
This Concrete Calculator in Minneapolis is designed for quantity estimates for residential and light-commercial concrete work within Minneapolis and the surrounding Twin Cities area. Use it for slabs, patios, garage floors, sidewalks, driveway sections, footings, posts and other common concrete shapes.
The volume formulas do not change by neighborhood: measure finished dimensions, enter the actual concrete thickness and calculate cubic yards. Local ready-mix pricing, delivery minimums, permits and construction details can vary, so enter your own supplier price rather than relying on a generic citywide average.
For a private sidewalk, walkway or driveway slab, calculate area from length × width and multiply by the specified concrete thickness. If a driveway includes a public driveway apron or curb-cut connection, that portion can be subject to separate City requirements.
Minneapolis currently requires a sidewalk inspection permit for sidewalk repair or construction, curbs or gutters, driveway aprons and pedestrian curb ramps. Curb-cut or drive-apron work has additional contractor requirements. Use the calculator for material quantity, then verify the exact permit and detail requirements before construction.
Minneapolis concrete work often requires careful cold-weather planning. Low temperatures can slow setting and strength development, and fresh concrete must be protected from freezing. These conditions do not change the geometric cubic-yard calculation, but they can affect batching, delivery, placement, finishing, protection and curing.
ACI 306R-16: Guide to Cold Weather Concreting provides guidance for cold-weather placement, and NRMCA CIP 27: Cold Weather Concreting explains practical field considerations.
For curing schedule planning after placement, use the Concrete Cure Time Calculator.
Exterior concrete in Minneapolis should be planned around drainage, subgrade support and seasonal freeze-thaw exposure. The calculator estimates material volume only; it does not determine frost protection, air entrainment, base thickness, reinforcement, jointing or drainage design.
Before ordering ready-mix, verify excavation, compacted base, forms, reinforcement and access. Uneven subgrade or unexpected deeper areas can increase concrete volume even when the nominal slab dimensions have not changed.
The City of Minneapolis says almost all construction projects require a building permit, although some minor work is exempt. Permit needs depend on the exact project scope.
For public-sidewalk-related concrete, Minneapolis requires a sidewalk inspection permit before building or repairing sidewalks, curbs or gutters, driveway aprons and pedestrian curb ramps. The City also states that curb-cut or drive-apron work must be completed by a sidewalk contractor licensed in Minneapolis.
Check the official Minneapolis Construction Permits section and the Sidewalk Inspection Permit page for current requirements.
The Minnesota Department of Labor and Industry publishes the Minnesota State Building Code and explains that it establishes the statewide minimum construction standard. Code adoption is periodically updated, so use the current official DLI code page rather than relying on a static calculator page for the applicable edition.
For current statewide information, use the Minnesota Department of Labor and Industry State Building Code overview. Minneapolis projects can also be subject to City zoning, permitting and inspection requirements.
This Concrete Calculator in Minneapolis is a quantity estimator only. It does not determine structural slab thickness, footing depth, frost protection, reinforcement or code compliance.
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 Minneapolis permitting information for the exact project scope.
The calculator does not select slab thickness, footing size, reinforcement or concrete strength.
Concrete sidewalks, curbs, gutters, driveway aprons and other work in the public right-of-way should follow City of Minneapolis construction details and permit requirements rather than generic residential assumptions.
The City publishes Standard Specifications & Detail Plates used for public-infrastructure and right-of-way work. Use the project-specific City details, approved plans and permit conditions where applicable.
Concrete quantity comes from finished project dimensions. Weather affects placement and curing procedures, not the basic geometric volume.
Suppose a Minneapolis 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 Minneapolis concrete yards, slabs, patios, driveways, bags, cost and permits.