Concrete Report: 12'x9'x6"


Estimated Concrete Volume
2 cubic yards
54 cubic feet

Estimated Weight of Concrete

3.59 tons

Covering 108 sq. ft. at 6" depth
Change dimensions

Optional 10% extra concrete
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

How Many Concrete Bags?*

12060lb Concrete bags
9080lb Concrete bags
27Small wheelbarrow loads
13.5Large wheelbarrow loads
*Approximation Estimate

Concrete Truck for 12'x9' x6"

0.2 Concrete Truck Loads (10 cu/yd Capacity)

Cost Estimate for 12'x9' 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
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

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 = 8
8 x $17.00 = $136.00
$216.44 + $136.00 = $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 12x9 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 12x9 x6"
12 * 9 = 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.

12 ft x 9 ft x 6" Concrete Summary

How much concrete do I need for an area of 12 ft x 9 ft x 6" depth? 2 cu. yds.
How many concrete bags would I need for a 12 ft x 9 ft x 6" slab? 90 x 80lb Concrete bags.
How much does it cost to pour a 12'x9' x6" slab? Ready-mix costs approx $352.44.
How much does it cost to hire a contractor to concrete a 12'x9' 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: 12 ft x 9 ft x 6", 12x9x6, 108 sq. ft., 12 x 9, 12x9, 12x9 x6", 12'x9'x6", 12'x9' 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.


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Disclaimer: All calculators, tools, and results featured on are to be finalized and not be considered a quotation or binding contract.
Proofs and formulas are provided as references.