Concrete for a 6×26 slab
1.93 cubic yards (96 × 80 lb bags)
for a 6×26 ft slab 4 inches thick: 52 cu ft. Bag counts include 10% extra; at 6 inches you need 2.89 yards.
A 6×26 foot slab covers 156 square feet. At the standard 4 inch thickness for a patio, walkway or shed floor, that is 52 cubic feet of concrete, or 1.93 cubic yards. At this size you can mix 96 bags of 80 lb (about $624 and a long day of mixing) or order 2.25 yards of ready-mix (about $371, plus the short-load fee most suppliers charge under 3 to 4 yards).
Concrete for a 6×26 slab by thickness
| Thickness | Cubic yards | Cubic feet | 80 lb bags | 60 lb bags | 40 lb bags |
|---|---|---|---|---|---|
| 3 in | 1.44 | 39 | 72 | 96 | 143 |
| 4 in | 1.93 | 52 | 96 | 128 | 191 |
| 5 in | 2.41 | 65 | 120 | 159 | 239 |
| 6 in | 2.89 | 78 | 143 | 191 | 286 |
| 8 in | 3.85 | 104 | 191 | 255 | 382 |
Bag counts include 10% extra for spillage and uneven ground. Cubic yards and cubic feet are the exact volume.
How it’s worked out
- Convert the thickness to feet: 4 in ÷ 12 = 0.333 ft.
- Multiply length × width × thickness: 26 × 6 × 0.333 = 52 cu ft.
- Divide by 27 for cubic yards: 52 ÷ 27 = 1.926 cu yd.
- Add 10% and divide by the bag yield: 57.2 ÷ 0.6 = 96 bags of 80 lb mix (rounded up).
Under the slab, plan on 4 inches of compacted gravel: about 1.93 cubic yards. For driveways and anything that carries a vehicle, go to 5 or 6 inches and add rebar or wire mesh.
Change the numbers
Other slab sizes
- 6×25 slab
- 6×24 slab
- 6×28 slab
- 6×22 slab
- 6×30 slab
- 5×26 slab
- 6×20 slab
- 6×32 slab
- 6×18 slab
- 4×26 slab
- 8×26 slab
- 6×16 slab
Questions
- How many bags of concrete do I need for a 6×26 slab?
- At 4 inches thick, a 6×26 slab takes 96 bags of 80 lb concrete mix, 128 bags of 60 lb mix or 191 bags of 40 lb mix, including 10% extra.
- How many yards of concrete for a 6×26 slab?
- 1.93 cubic yards at 4 inches thick, 2.41 at 5 inches and 2.89 at 6 inches, before adding extra for waste.
- How much does a 6×26 concrete slab cost?
- The concrete alone for a 4 inch 6×26 slab costs about $624 in 96 bags of 80 lb mix (at about $7 a bag) or about $371 for 2.25 yards of ready-mix (at about $165 a yard, before delivery fees). Professionally poured slabs usually run $6 to $12 per square foot, about $936 to $1,872 for 156 sq ft.
- How much does a 6×26 slab weigh?
- About 3.8 tons at 4 inches thick (concrete weighs about 145 lb per cubic foot).