Answer
Estimated Concrete Volume
2 cubic yards
54 cubic feet
Estimated Weight of Concrete
3.59 tons
Covering 108 sq. ft. at 6" depthChange dimensions
Optional 10% extra concrete
for waste allowance
10% = 0.2 cubic yards
Total Concrete with 10% = 2.2 cubic yards
for waste allowance
10% = 0.2 cubic yards
Total Concrete with 10% = 2.2 cubic yards
Order Size
This order size is considered
Medium to Large
Medium to Large
How Many Concrete Bags?*
| 120 | 60lb Concrete bags |
| 90 | 80lb Concrete bags |
| 27 | Small wheelbarrow loads |
| 13.5 | Large wheelbarrow loads |
Concrete Truck for 9'x12' x6"
20%
0.2 Concrete Truck Loads (10 cu/yd Capacity)
Cost Estimate for 9'x12' x6"
Purchasing ready-mix concrete is by far the easiest way to mix concrete for medium to large projects and can even be used on smaller projects as well. We have provided a cost comparison between ready mix and DIY concrete premix bags to give you a rough ballpark estimate.
Bag Cost Estimate
Pre-mixed concrete bags cost on average $3.50 per 80lb bag. Using pre-mixed bags to cover 108 sq ft at a depth of 6", the estimated cost is $315.00
$315.00
for 90 x 80lb bags
Truck Cost Estimate
Ready-mixed concrete costs on average $108.22 per cubic yard delivered. Using a concrete truck to cover 108 sq ft at a depth of 6", the estimated cost is $216.44
8 x $17.00 = $136.00
$216.44 + $136.00 = $352.44
*6 inch pours and under.
**Cost assumes subbase and general prep is done.
Concrete trucks may also charge a "short load" fee for partially filled loads. Short load fees are charged at about $17 for every yard not used on the truck.
So for a 10 cu/yd Truck Load - 2 cu/yd concrete = 88 x $17.00 = $136.00
$216.44 + $136.00 = $352.44
$352.44
Pros Do Everything*
| $540.00 | $5.00 sq ft Low End** |
| $648.00 | $6.00 sq ft |
| $756.00 | $7.00 sq ft |
| $864.00 | $8.00 sq ft |
| $1,134.00 | $10.50 sq ft High End*** |
*6 inch pours and under.
**Cost assumes subbase and general prep is done.
Concrete Extras
A well-compacted subbase provides a strong foundation for concrete to lay on. We recommend you contact your nearest concrete supplier for their recommendations on whether you need a subbase, base depth, and rock type.
With a brief look, a 9x12 area at 6 inches deep, you would need approximately 2.84 tons or 2 cubic yards of gravel.
Concrete reinforcing is also recommended in high traffic areas and medium to large areas. Wire mesh on average costs $0.56 per sq ft and fiber mesh costs $0.13 per sq ft.
So for your 108 sq ft area, this may roughly cost $60.48 for wire mesh, $324.00 for thicker wire rebar mesh and $14.04 for fiber mesh.
*Reinforcing for 10 inch pours and under.How to Calculate Concrete Amount for 9x12 x6"
9 * 12 = 108 sq ft
6 / 12 = 0.5 ft depth
108 * 0.5 = 54 cu ft
54 / 27 = 2
= 2 cu/yd
How to Calculate Concrete Weight
2 * 3590 = 7180 lbs
Density of concrete used 2130 kg/m3or 133 lbs/ft3.
6 / 12 = 0.5 ft depth
108 * 0.5 = 54 cu ft
54 / 27 = 2
= 2 cu/yd
How to Calculate Concrete Weight
2 * 3590 = 7180 lbs
Density of concrete used 2130 kg/m3or 133 lbs/ft3.
9 ft x 12 ft x 6" Concrete Summary
How much concrete do I need for an area of 9 ft x 12 ft x 6" depth? 2 cu. yds.
How many concrete bags would I need for a 9 ft x 12 ft x 6" slab? 90 x 80lb Concrete bags.
How much does it cost to pour a 9'x12' x6" slab? Ready-mix costs approx $352.44.
How much does it cost to hire a contractor to concrete a 9'x12' x6" slab? A pro costs between $540.00 and $1,134.00.
How do you calculate concrete volume? Formula ((width x length) x (depth in inches / 12)) / 27 = total cubic yards. See our how to here
How many concrete bags would I need for a 9 ft x 12 ft x 6" slab? 90 x 80lb Concrete bags.
How much does it cost to pour a 9'x12' x6" slab? Ready-mix costs approx $352.44.
How much does it cost to hire a contractor to concrete a 9'x12' x6" slab? A pro costs between $540.00 and $1,134.00.
How do you calculate concrete volume? Formula ((width x length) x (depth in inches / 12)) / 27 = total cubic yards. See our how to here
This Page is Calculated for the Following: 9 ft x 12 ft x 6", 9x12x6, 108 sq. ft., 9 x 12, 9x12, 9x12 x6", 9'x12'x6", 9'x12' x6"
This Concrete calculator can be used for a slab, floor, garage, block, wall, driveway, patio, countertop, footings, foundation, pool or basement, and most rectangular areas.
This Concrete calculator can be used for a slab, floor, garage, block, wall, driveway, patio, countertop, footings, foundation, pool or basement, and most rectangular areas.