Primary material
62 bags
80 lb concrete mix
Use the calculated bag count as your buying starting point, then verify yield and pallet limits with the store.
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Concrete Slabs, footings, walls, columns, stairs, post holes, curbs, block, and cost. Roofing Roof area, squares, shingle bundles, and roof replacement cost. Landscaping Mulch, topsoil, gravel, paver base, and river rock. Paint Interior, trim, and exterior paint, primer, and coats. Flooring Boxes, tile, grout, underlayment, and installed cost. Deck Deck boards, joists, footings, stairs, and cost by material. Fence Posts, pickets, rails, depth, and installation cost. Asphalt & Driveway Asphalt tonnage and driveway cost by surface. Masonry Concrete block (CMU) walls, blocks, and mortar. Drywall & Insulation Drywall sheets, mud, studs, and insulation by R-value.
Most-used calculator
Concrete slab — try it now
Concrete is our most-used calculator. Estimate volume, bags, ready-mix cost, and a shopping list here, then browse the other materials above.
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Mulch calculator Cubic yards, 2 cu ft bags, 3 cu ft bags, depth, and bulk planning. MVP Topsoil calculator Cubic yards, tons, 40 lb bags, lawn patches, and bulk topsoil. MVP Gravel calculator Cubic yards, tons, bagged gravel, paths, drainage, and driveway strips. MVP Paver base calculator Compacted gravel base, leveling sand, tons, bag counts, and bulk planning. MVP River rock calculator Decorative rock beds, borders, drainage strips, yards, tons, and bags. MVP Sand calculator Masonry, paver, play, or fill sand by cubic yards, tons, and bags. MVP Sod calculator Sod rolls and pallets for a new lawn from length and width. MVP Concrete slab Yards, 80 lb bags, 60 lb bags, and material cost. Live sample Post hole concrete Hole count, diameter, depth, and fast-setting bags. MVP Concrete footing Continuous footings, pad footings, yards, and bags. MVP Concrete wall Poured walls, stems, thickness, yards, and bags. MVP Concrete column Round columns, piers, diameter, height, and bags. MVP Concrete stairs Step count, rise, run, width, yards, and bags. MVP Concrete curb Curb length, width, height, yards, and bags. MVP Concrete cost Ready-mix vs bagged material, labor, and installed cost. MVP Concrete block (CMU) Block count, mortar bags, wall openings, and material cost. MVP Roofing calculator Roof area, squares, shingle bundles, underlayment, and pitch. MVP Roof replacement cost Installed roof cost by type, tear-off, and a low-to-high range. MVP Paint coverage Wall area, coats, gallons, primer, and trim allowance. MVP Trim paint calculator Baseboards, door casing, window trim, crown molding, quarts, and prep. MVP Exterior paint calculator Siding area, gables, doors, windows, primer, gallons, and 5-gal pails. MVP Flooring boxes calculator Square feet, box coverage, cut waste, underlayment, and total boxes. MVP Tile calculator Tile size, grout joints, layout waste, boxes, grout, and thinset. MVP Flooring cost calculator Material, waste, underlayment, removal, trim, labor, and installed total. MVP Underlayment calculator Underlayment rolls, coverage, overlap waste, and cost by type. MVP Transition & trim calculator Transition strips, quarter round, and stair nose by the piece. MVP Asphalt calculator Hot-mix tonnage, cubic yards, driveway depth, and material cost. MVP Driveway cost Installed driveway cost by surface — asphalt, concrete, gravel, pavers. MVP Fence calculator Posts, pickets, rails, sections, and post spacing. MVP Fence post calculator Post count, spacing, buried depth, post length, and concrete. MVP Fence installation cost Installed cost by material — wood, vinyl, chain link, aluminum. MVP Deck board calculator Deck boards, joists, linear feet, board size, and joist spacing. MVP Deck joist & footing Joist count by 12/16/24 in spacing, plus footing count. MVP Deck stair & stringer Risers, riser height, treads, total run, and stringer length. MVP Deck cost Installed deck cost by material — pressure-treated, cedar, composite, PVC. MVP Drywall calculator Sheets, joint compound, tape, screws, and studs from room size. MVP Insulation calculator Batts, rolls, or blown-in bags by area and R-value. MVP Brick calculator Bricks and mortar from wall size, ~7 bricks per square foot. MVP Retaining wall block Wall blocks, cap blocks, courses, and base gravel. MVP
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Add a tool to the catalog, connect its calculator section, then reuse the same result, source, FAQ, and ad layout.
Shopping list
Ready to price and order
Use the calculated quantities as a starting cart, then compare store availability, delivery fees, pallet limits, and local ready-mix minimums before buying.
Large pours
Ready-mix quote check
For high bag counts, compare the bagged route against local ready-mix minimums, delivery, access, and unload time.
Optional base
Gravel base
Base depth is project-specific. Estimate it separately before adding bags or bulk gravel to the order.
Optional forms
Forms and stakes
Plan lumber, stakes, screws, release, and bracing around the perimeter and any step-downs or curves.
Store buttons open retailer search results for now. Confirm exact product yield, pickup, delivery, and pallet rules before ordering.
Formula shown
How the estimate is calculated
1. Cubic feet
length ft x width ft x (thickness in / 12)
2. Cubic yards
cubic feet / 27
3. Bags
ceil(cubic feet with waste / bag yield)
Sources
- Quikrete product yields — bagged concrete mix yield references
- Sakrete bagged concrete references — common bag sizes and concrete mix guidance
- ConcreteNetwork concrete price guide — ready-mix and installed concrete cost context
Reviewed for estimating accuracy
Last updated: June 20, 2026
Estimate only.
This calculator is not a quote. Verify product yield, price, delivery minimums, and local conditions with your supplier or contractor before buying materials.
FAQ
Concrete slab questions
Quick answers for the common buying decisions: bag count, ready-mix, and waste allowance.
How many 80 lb bags do I need for a 10x10 slab? + -
For a 10 ft by 10 ft slab at 4 inches thick, plan on about 62 bags of 80 lb concrete after the default 10% waste allowance. You can edit waste in the calculator.
When should I order ready-mix instead of bags? + -
Bags are practical for small pours and post holes. Larger slabs are usually easier to order by the cubic yard, especially once the bag count gets hard to mix by hand.
Why add waste? + -
A 5% to 15% waste allowance helps cover uneven subgrade, spillage, and small measuring errors so the pour is not short.