Bag & BucketConcrete for a 4x4 Slab: Yards & Bags
A 4 × 4 ft slab at 4 inches thick is 0.2 cubic yards. With 10% extra for waste, plan on 0.22 cubic yards: 10 bags of 80 lb or 14 bags of 60 lb mix. Change the thickness below.
0.22 cubic yards of concrete
- Cubic yards
- 0.22
- Cubic feet
- 5.87
- 80 lb bags
- 10
- 60 lb bags
- 14
- 40 lb bags
- 20
- Includes 10% extra for spillage and uneven ground.
- Bag yields: 80 lb ≈ 0.60 cu ft, 60 lb ≈ 0.45 cu ft, 40 lb ≈ 0.30 cu ft.
Frequently asked questions
How many bags of concrete for a 4x4 slab?
About 10 bags of 80 lb concrete at 4 inches thick, including 10% extra.
Developers: GET /api/concrete-calculator returns JSON.