How Many Bags of Concrete for a 6x10 Slab?
A 6 by 10 foot slab at 4 inches holds 20.00 cubic feet of concrete. How many bags of concrete for a 6x10 slab comes to 34 bags of 80 lb mix or 45 of the 60 lb size, before a spare bag or two for waste.
Concrete calculator →How the bag count is figured
- Area: 6 × 10 = 60 sq ft.
- Volume at 4 in: 60 × 0.333 = 20.00 cu ft.
- 80 lb bags: 20.00 ÷ 0.60 = 33.3, round up to 34.
- 60 lb bags: 20.00 ÷ 0.45 = 44.4, round up to 45.
Check the yield printed on your brand’s bag, since it varies a little. The concrete calculator handles other shapes.
Related: How Much Concrete for a 6x10 Slab?
Bags by thickness for a 6x10 slab
| Thickness | Cubic feet | 80 lb bags | 60 lb bags | 40 lb bags |
|---|---|---|---|---|
| 3 in | 15.00 | 25 | 34 | 50 |
| 4 in | 20.00 | 34 | 45 | 67 |
| 5 in | 25.00 | 42 | 56 | 84 |
| 6 in | 30.00 | 50 | 67 | 100 |
Bags or a truck?
At 0.74 cubic yards, this pad is well under the point where a ready-mix truck starts to make sense. Many plants charge a small-load fee on tiny orders, so bags are often cheaper here, and a rented mixer makes 34 bags manageable for two people.
Related: How Many Bags of Concrete for a 10x10 Slab?
Forms and base
A small slab still needs a firm base. Compact the soil, add compacted gravel and set forms to the finished height. If the pad will hold an AC unit, a generator or a grill, keep the top a little above the surrounding grade so water does not pool against it. Mix to a stiff, oatmeal-like consistency; extra water makes it easier to place but weaker.
Buying the bags
Most stores stock 40, 60 and 80 lb bags. The 80 lb size means fewer bags to open, while 60 lb bags are easier to carry. Either way, buy a spare or two; a short pour is worse than a leftover bag.
Questions people ask
How many 80 lb bags for a 6x10 slab?
About 34 bags at 4 inches thick.
How many 60 lb bags for a 6x10 slab?
About 45 bags at 4 inches thick.
How many bags for a 6x10 slab 6 inches thick?
About 50 bags of 80 lb mix or 67 of 60 lb.
How much does an 80 lb bag of concrete yield?
About 0.6 cubic feet of mixed concrete.
When is bagged concrete practical?
Usually for jobs under about a cubic yard. Beyond that, mixing dozens of bags by hand gets slow and batches may not blend well.
Related guides
- How Much Area Does a Yard of Concrete Cover?
- How Many Bags of Concrete in a Yard? 40, 60, 80 lb
- Gravel Base Under a Concrete Slab: Depth and Tons
- How Many Yards in a Concrete Truck? Mixer Sizes
- Concrete Short Load Fee: What It Is and How to Cut It
- 60 lb vs 80 lb Concrete Bags: Yield, Count, and Cost
- Rebar vs Wire Mesh in a Slab: Which One to Use
- How Many Bags of Concrete for a 6x6 Slab?
- How Many Bags of Concrete for a 5x8 Slab?
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