Concrete for a 26×50 slab
16.05 cubic yards (795 × 80 lb bags)
for a 26×50 ft slab 4 inches thick: 433.3 cu ft. Bag counts include 10% extra; at 6 inches you need 24.07 yards.
A 26×50 foot slab covers 1300 square feet. At the standard 4 inch thickness for a patio, walkway or shed floor, that is 433.3 cubic feet of concrete, or 16.05 cubic yards. At this size ready-mix is cheaper and far less work than bags: about 17.75 yards, roughly $2,929 before delivery fees, against $5,168 for 795 bags of 80 lb mix.
Concrete for a 26×50 slab by thickness
| Thickness | Cubic yards | Cubic feet | 80 lb bags | 60 lb bags | 40 lb bags |
|---|---|---|---|---|---|
| 3 in | 12.04 | 325 | 596 | 795 | 1192 |
| 4 in | 16.05 | 433.3 | 795 | 1060 | 1589 |
| 5 in | 20.06 | 541.7 | 994 | 1325 | 1987 |
| 6 in | 24.07 | 650 | 1192 | 1589 | 2384 |
| 8 in | 32.1 | 866.7 | 1589 | 2119 | 3178 |
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: 50 × 26 × 0.333 = 433.33 cu ft.
- Divide by 27 for cubic yards: 433.33 ÷ 27 = 16.049 cu yd.
- Add 10% and divide by the bag yield: 476.67 ÷ 0.6 = 795 bags of 80 lb mix (rounded up).
Under the slab, plan on 4 inches of compacted gravel: about 16.05 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
- 25×50 slab
- 24×50 slab
- 28×50 slab
- 22×50 slab
- 30×50 slab
- 26×40 slab
- 20×50 slab
- 32×50 slab
- 26×36 slab
- 18×50 slab
- 26×32 slab
- 16×50 slab
Questions
- How many bags of concrete do I need for a 26×50 slab?
- At 4 inches thick, a 26×50 slab takes 795 bags of 80 lb concrete mix, 1060 bags of 60 lb mix or 1589 bags of 40 lb mix, including 10% extra.
- How many yards of concrete for a 26×50 slab?
- 16.05 cubic yards at 4 inches thick, 20.06 at 5 inches and 24.07 at 6 inches, before adding extra for waste.
- How much does a 26×50 concrete slab cost?
- The concrete alone for a 4 inch 26×50 slab costs about $5,168 in 795 bags of 80 lb mix (at about $7 a bag) or about $2,929 for 17.75 yards of ready-mix (at about $165 a yard, before delivery fees). Professionally poured slabs usually run $6 to $12 per square foot, about $7,800 to $15,600 for 1300 sq ft.
- How much does a 26×50 slab weigh?
- About 31.4 tons at 4 inches thick (concrete weighs about 145 lb per cubic foot).