10x10 Concrete Slab, 4 Inches Thick
A 10 × 10 ft slab (100 sq ft) at 4 in thick takes about 1.36 cubic yards of concrete, with 10% extra for waste. For ready-mix, order 1.5 cu yd for the 10x10, about $270 – $380 delivered, short-load fee included. Bagged, the same 10x10 is 62 80 lb or 82 60 lb bags, about $410 – $574 for the concrete alone.
- Ready-mix order
- 1.5 cu yd
- Ready-mix cost
- $270 – $380
- 80 lb bags
- 62
- Bag cost
- $410 – $574
The 10x10 (4 in) prices are national material ranges as of 2026-09, not a quote from a supplier.
What people build on a 10x10 slab
One hundred square feet is the go-to size for a 10x10 storage shed, a small patio, or a pad for a pergola or gazebo kit sold at that footprint.
As a patio, 10x10 holds a 48 in round table with four chairs and room to pull them out, which is about the smallest comfortable dining space outdoors.
Many towns let a shed up to 120 sq ft go up without a building permit, following the IRC exemption for small accessory buildings, so a 10x10 shed usually stays under it; your town can set a different limit.
A 4 in 10x10 pour: check first
- Ask the town about setbacks from the property line even when the shed needs no permit.
- For a gazebo, check where its posts land and add a thicker footing under each one if the kit calls for it.
- Set the forms square by measuring both diagonals; on a 10x10 they should both read about 14 ft 1-3/4 in.
Full plan for a 10x10 slab, 4 in
- Area
- 100 sq ft
- Thickness
- 4 in
- Volume
- 1.36 cu yd
Bagged concrete estimate (DIY)
$507 – $732
Est. as of 2026-09 — not a live quote
Ready-mix delivered, incl. short-load fee (materials only)
$270 – $380
Est. as of 2026-09 — not a live quote
For a pour this size, ready-mix delivery is typically more practical than mixing bags by hand.
Shopping list
- Concrete mix (60 lb bags) Or 123 × 40 lb, 98 × 50 lb or 62 × 80 lb bags. 82 bags
- Ready-mix concrete Alternative to bagged mix; most suppliers have a 1 cu yd order minimum. 1.5 cu yd
- Compactable gravel sub-base 4 in compacted base beneath the slab. 1.67 tons
- 6x6 welded wire mesh Reinforcement for crack control; not a substitute for engineered rebar on structural slabs. 110 sq ft
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Buy bagged concrete
Pick up bagged mix and reinforcement from a hardware store for smaller pours.
View shopping listAssumptions
- Waste allowance: 10% applied to account for over-excavation and spillage.
- Approx. wet weight: 5,500 lb (2.8 tons).
- Prices are national-average retail/delivery ranges as of 2026-09, not live quotes.
- Ready-mix orders under 10 cu yd usually carry a short-load fee; the ready-mix range includes a flat $60-$110. Some suppliers charge per yard instead, so ask for the full fee schedule.
Bags or ready-mix for a 10x10 slab, 4 in?
At 1.36 cu yd, the 10x10 sits where bagged concrete and ready-mix cross over in price. For the 10x10, 62 80 lb bags cost about $410 – $574, while 1.5 cu yd of ready-mix costs about $270 – $380, short-load fee included. Ready-mix wins for this 10x10 by roughly $167 (range midpoints), and nobody has to mix 62 bags by hand.
Is 4 in thick enough for a 10x10 slab?
Foot traffic, patio furniture and a shed all sit fine on a 10x10 poured 4 in thick, the standard for slabs that don't carry vehicles.
Control joints for a 10x10 slab at 4 in
Like any slab, a 4 in 10x10 shrinks while it cures; control joints decide where its cracks go. ACI and PCA guidance spaces joints 24 to 36 times the thickness, which for this 10x10 at 4 in is every 8 to 12 ft, sawn 1 in deep (a quarter of the slab) once the surface holds up to the blade, usually within a day.
No side of a 10x10 slab is longer than 10 ft, so at 4 in it can go without an interior joint. Tool one across the middle of the 10x10 anyway if you want a straight line for any crack to follow.
How much a 10x10 slab 4 in thick weighs
Wet concrete weighs about 150 lb per cubic foot, so the 10x10 pour is about 5,500 lb (2.8 tons). As bags, the 10x10 is 62 80 lb bags, 4,960 lb in all: about 4 trips in a pickup carrying 1,500 lb a load. For that many trips with the 10x10, check the payload on your truck's door-jamb sticker, or have the store deliver the pallets for a fee.
The 10x10 at 4 in against nearby sizes
Every row uses the same 10% waste and prices as the 10x10 at 4 in; costs are for the concrete only.
| Slab | Cu yd | 60 lb bags | 80 lb bags | Ready-mix order | Bags cost | Ready-mix cost |
|---|---|---|---|---|---|---|
| 8x10 slab, 4 in | 1.09 | 66 | 49 | 1.25 cu yd | $330 – $462 | $235 – $335 |
| 10x10 slab, 4 in (this page) | 1.36 | 82 | 62 | 1.5 cu yd | $410 – $574 | $270 – $380 |
| 10x12 slab, 4 in | 1.63 | 98 | 74 | 1.75 cu yd | $490 – $686 | $305 – $425 |
Questions about a 10x10 slab, 4 in
How many bags of concrete for a 10x10 slab 4 inches thick?
Plan on 36.7 cubic feet for the 10x10, which is 62 80 lb bags, 82 60 lb bags, 98 50 lb or 123 40 lb bags once 10% waste is in.
How many yards of concrete for a 10x10 slab 4 inches thick?
1.36 cubic yards with waste (1.23 without) for a 10x10 at 4 in. Round the 10x10 order to 1.5 cu yd: plants batch in quarter yards and most won't send less than a yard.
How much does a 10x10 concrete slab 4 inches thick cost?
Concrete alone for the 10x10 runs about $270 – $380 for 1.5 cu yd of ready-mix delivered, short-load fee included, or $410 – $574 for 82 60 lb bags. Add a 4 in gravel base and wire mesh and the bagged 10x10 plan comes to $507 – $732. Labor, forms and finishing for a 10x10 at 4 in come on top of these national ranges (as of 2026-09), which are not quotes.
How much does a 10x10 concrete slab 4 inches thick weigh?
About 5,500 lb (2.8 tons) of wet concrete for the 10x10, at 150 lb per cubic foot. The 62 80 lb bags for a 10x10 weigh 4,960 lb: about 4 trips in a pickup carrying 1,500 lb a load.
Where do control joints go on a 10x10 slab 4 inches thick?
On a 10x10 at 4 in, every 8 to 12 ft (24 to 36 times the thickness), sawn 1 in deep. No side of a 10x10 slab is longer than 10 ft, so at 4 in it can go without an interior joint. Tool one across the middle of the 10x10 anyway if you want a straight line for any crack to follow.
Limitations
The 10x10 figures at 4 in are material estimates and typical price ranges, not a quote or a structural design. Confirm that 4 in, the reinforcement and the joint layout suit your soil, loads and local code for a 10x10 slab with a qualified professional.