Concrete for a 14×26 slab
4.49 cubic yards (223 × 80 lb bags)
for a 14×26 ft slab 4 inches thick: 121.3 cu ft. Bag counts include 10% extra; at 6 inches you need 6.74 yards.
A 14×26 foot slab covers 364 square feet. At the standard 4 inch thickness for a patio, walkway or shed floor, that is 121.3 cubic feet of concrete, or 4.49 cubic yards. At this size ready-mix is cheaper and far less work than bags: about 5 yards, roughly $825 before delivery fees, against $1,450 for 223 bags of 80 lb mix.
Concrete for a 14×26 slab by thickness
| Thickness | Cubic yards | Cubic feet | 80 lb bags | 60 lb bags | 40 lb bags |
|---|---|---|---|---|---|
| 3 in | 3.37 | 91 | 167 | 223 | 334 |
| 4 in | 4.49 | 121.3 | 223 | 297 | 445 |
| 5 in | 5.62 | 151.7 | 279 | 371 | 557 |
| 6 in | 6.74 | 182 | 334 | 445 | 668 |
| 8 in | 8.99 | 242.7 | 445 | 594 | 890 |
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 × 14 × 0.333 = 121.33 cu ft.
- Divide by 27 for cubic yards: 121.33 ÷ 27 = 4.494 cu yd.
- Add 10% and divide by the bag yield: 133.47 ÷ 0.6 = 223 bags of 80 lb mix (rounded up).
Under the slab, plan on 4 inches of compacted gravel: about 4.49 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
- 14×25 slab
- 15×26 slab
- 14×24 slab
- 14×28 slab
- 12×26 slab
- 16×26 slab
- 14×22 slab
- 14×30 slab
- 14×20 slab
- 14×32 slab
- 10×26 slab
- 18×26 slab
Questions
- How many bags of concrete do I need for a 14×26 slab?
- At 4 inches thick, a 14×26 slab takes 223 bags of 80 lb concrete mix, 297 bags of 60 lb mix or 445 bags of 40 lb mix, including 10% extra.
- How many yards of concrete for a 14×26 slab?
- 4.49 cubic yards at 4 inches thick, 5.62 at 5 inches and 6.74 at 6 inches, before adding extra for waste.
- How much does a 14×26 concrete slab cost?
- The concrete alone for a 4 inch 14×26 slab costs about $1,450 in 223 bags of 80 lb mix (at about $7 a bag) or about $825 for 5 yards of ready-mix (at about $165 a yard, before delivery fees). Professionally poured slabs usually run $6 to $12 per square foot, about $2,184 to $4,368 for 364 sq ft.
- How much does a 14×26 slab weigh?
- About 8.8 tons at 4 inches thick (concrete weighs about 145 lb per cubic foot).