Estimated Concrete Volume
2 cubic yards
54 cubic feet
Estimated Weight of Concrete
3.59 tonsCovering 108 sq. ft. at 6" depth
for waste allowance
10% = 0.2 cubic yards
Total Concrete with 10% = 2.2 cubic yards
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 12'x9' x6"
Cost Estimate for 12'x9' x6"
Bag Cost Estimate
Truck Cost Estimate
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.
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.
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 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 Concrete calculator can be used for a slab, floor, garage, block, wall, driveway, patio, countertop, footings, foundation, pool or basement, and most rectangular areas.