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Concrete slab material list

A 10 × 10 ft patio 4 in thick takes 1.36 yd³ of ready-mix or 62 bags of 80 lb mix, ten 20 ft #4 bars, four 10 ft form boards on 14 stakes, 1.5 yd³ of gravel for a 4 in base and a gallon of cure & seal.

Describe the slab once: its shape, size and thickness, and any edge that meets the house. The list runs the slab and rebar calculators from that description and adds what a pour needs that no calculator counts, from Quikrete’s own project guides: form boards and stakes, the gravel base, the isolation strip and the curing compound. Copy it, print it, or send the link.

Figures checked October 11, 2026

Size

4 in is usual for patios and walks; 5 to 6 in for a driveway.

Edges

The length of edge that meets a wall, foundation or slab, for the isolation strip. Leave blank for none.

10 × 10 ft slab

1.36 yd³ · 62 bags · 10 bars

ConcreteAdjust
Ready-mix concrete, cubic yards33.3 ft³ in the forms, 10% extra to order
1.36
80 lb bags of concrete mix, if mixing by hand instead0.6 ft³ a bag, for the same 1.36 yd³
62

More than 60 bags is a lot of hand mixing: above roughly a cubic yard, compare a ready-mix quote.

RebarAdjust
#4 rebar, 20 ft10 bars lengthwise and 10 widthwise at 12 in, 190 ft and 127 lb of steel
10

Set the grid on chairs or bricks so it sits in the slab, not on the ground; your plans or engineer set the bar size, spacing and laps.

Forms
2×6 form boards, 10 ft40 ft of forms, 5 1/2 in deep for a 4 in slab
4
Form stakesone every 3 ft along the outside of the forms
14
3 in screws2 per stake and corner
36

A 2×4 is 3 1/2 in deep: Quikrete’s patio guide pours 3 1/2 in of concrete in 2×4 forms. 2×6s hold the full 4 in.

Base
Compactible gravel or crushed stone, cubic yards42 ft³: 5 in loose, tamped to 4 in
1.5
Joints

Enter the length of any edge that meets the house, a wall or another slab, and the list adds the ½ in isolation strip for it.

Cut 2 control joints (20 ft), 1 in deep, so no panel is more than 8 ft across: Quikrete says every 6 to 8 ft in a 4 in slab.

Curing
Acrylic cure & seal, gallons0.5 gal at 200 sq ft a gallon
1

Or keep the slab wet under plastic sheeting or wet burlap for the first days instead; the evaporation calculator says how fast it dries today.

Where the slab doesn’t say, the list assumes: 10% extra concrete; #4 rebar 12 in on center, 3 in from the edges, 20 ft bars lapped 40 diameters; Forms staked every 3 ft; 4 in of compacted gravel; cure & seal at 200 sq ft a gallon.

What each group counts

  • Concrete comes from the slab calculator: the slab’s volume with 10% extra, as cubic yards to order from a ready-mix plant, and as 80 lb bags at the maker’s yield if you mix by hand. Above about a cubic yard it suggests a ready-mix quote.
  • Rebar comes from the rebar calculator: bars each way at 12 in on center, 3 in clear of the edges, in 20 ft lengths, lapped 40 bar diameters where a run is longer than a bar. A round slab gets no grid here; lay its bars out by hand.
  • Forms follow Quikrete’s patio guide: 2× boards around the perimeter in stock lengths, as deep as the slab is thick, a stake every 3 ft and two 3 in screws per stake. A round slab gets a flexible form the length of its circumference.
  • Base is the same guide’s 5 in of compactible gravel, tamped to 4 in, over the slab’s area.
  • Joints: the ½ in asphalt-impregnated isolation strip along any edge you say meets a structure, and how many control joints to cut so no panel is more than 8 ft across.
  • Curing: acrylic cure & seal at 200 sq ft a gallon, or keep the slab wet under plastic sheeting instead. The evaporation calculator says how fast today’s weather will dry it.

How to use it

  1. Measure the finished slab: the outside of the forms, and the thickness you’ll pour. 4 in is usual for a patio or walk; a driveway is 5 to 6 in.
  2. Say which edge meets the house, a foundation or another slab, so the list adds the isolation strip for it.
  3. Adjust what the slab doesn’t say. Bar size and spacing, bag size, the extra to order and the prices live on the calculators; each group’s “Adjust” link opens its calculator with the slab filled in, and this browser keeps the slab.
  4. Copy the list and paste it into a quote request, or print it as the order sheet.

Before you pour

Your permit office decides what applies where you live: slab thickness, reinforcement, frost protection and whether a vapor barrier is needed. The slab calculator explains the IRC minimums it checks, and the slab thickness guide covers the common jobs.

What you still need to count

Chairs or bricks to hold the rebar at mid-depth and tie wire for the crossings; form release; a vapor barrier under a slab that becomes a floor; a bull float, edger and jointer or the saw to cut the joints; plastic sheeting if you cure under it; and the permit fee. Mesh, fiber-reinforced mix and ready-mix delivery and short-load fees are priced by your supplier.

Questions people ask

What do I need to pour a 10 × 10 patio?

At 4 in thick: 1.36 yd³ of ready-mix (33.3 ft³ plus 10% extra), or 62 bags of 80 lb concrete mix if you mix it yourself; ten 20 ft #4 bars for a grid 12 in on center; four 10 ft 2×6 form boards, 14 stakes and 36 screws; 1.5 yd³ of gravel for a 4 in compacted base; and a gallon of acrylic cure & seal. Add the length of the edge against the house and the list adds the ½ in isolation strip. Two control joints keep every panel under 8 ft.

Are the quantities the same as on the slab and rebar calculators?

Yes. The concrete is the slab calculator’s figure for this slab with its 10% extra, and the bars are the rebar calculator’s grid at its defaults: #4 bars 12 in on center, 3 in clear of the edges, in 20 ft lengths lapped 40 diameters. “Adjust” beside either group opens that calculator with the slab filled in; what you change there comes back to the list on this browser.

Where do the forms, base and curing figures come from?

From Quikrete’s published project guides. The patio guide builds the forms from 2×4s staked every 3 ft, spreads about 5 in of compactible gravel and tamps it to 4 in, and glues a ½ in asphalt-impregnated fiber board where the slab meets a structure. The sidewalk guide cuts control joints every 6 to 8 ft in a 4 in slab, a quarter of the thickness deep. The cure & seal data sheet gives 200 sq ft a gallon. The list applies those rules to your slab’s perimeter and area; the form boards come in the stock lengths lumber yards carry.

Why 2×6 form boards for a 4 in slab?

A 2×4 is 3½ in deep, so Quikrete’s guide pours 3½ in of concrete in 2×4 forms. For a 4 in slab the list picks the first board as deep as the slab is thick, a 2×6 at 5½ in. Many people set 2×4 forms half an inch proud of the base instead; if you do, buy 2×4s in the same lengths.

What isn’t on the list?

Anything the guides don’t quantify: rebar chairs and tie wire, form release (the guide uses vegetable oil), a vapor barrier where a slab becomes a floor, mesh if you use it instead of bars, tools, and the permit. The how-much-concrete guide walks the whole job.

Sources for the numbers on this page

  1. Quikrete — Concrete Mix No. 1101 — technical data sheet (bag yields, strength gain, curing) · checked October 1, 2026
  2. Sakrete — Estimating bagged concrete jobs · checked October 1, 2026
  3. State of Ohio (adopted IRC text) — Residential Code of Ohio 4101:8-5-01 — R506.1 concrete floors on ground (3½ in minimum) · checked October 1, 2026
  4. Caltrans — Bridge Design Details, ch. 13 — ASTM A615 bar sizes, areas and weights · checked October 1, 2026
  5. Element ICF — TB-4 Lap splices (IRC Table R608.5.4(1) values for Grade 40 and Grade 60) · checked October 1, 2026
  6. Quikrete — Building a concrete patio — project guide (2×4 forms, stakes at 3 ft, 4 in compacted gravel, ½ in isolation joint) · checked October 11, 2026
  7. Quikrete — Concrete sidewalks and small slabs — project guide (control joints every 6 to 8 ft, ¼ of the thickness deep) · checked October 11, 2026
  8. Quikrete — Acrylic Concrete Cure & Seal No. 8730 — data sheet (200 sq ft per gallon) · checked October 11, 2026
  9. National Ready Mixed Concrete Association — CIP 11 — Curing in-place concrete · checked October 1, 2026
  10. Southern Forest Products Association — Southern Pine standard sizes (nominal and actual dimensions) · checked October 3, 2026
  11. Southern Forest Products Association — Southern Pine specification guidelines (standard lengths, 8 to 20 ft in two-foot steps) · checked October 4, 2026

Corrections and updates are logged on the sources page.