How many bags of concrete do I need for a 10×12 slab | how much concrete do I need for a 10×12 slab | how many yards of concrete do I need for a 10×12 slab | how many cubic feet of concrete do I need for a 10×12 slab | How many bags of concrete do I need for a 10×12 slab at 4″ thick | How many bags of concrete do I need for a 10×12 slab at 5″ thick | How many bags of concrete do I need for a 10×12 slab at 6″ thick.

A bag of concrete ready mix made of blended mix of Portland cement, sand gravel and other approved ingredient or admixture, generally, dry ready mix concrete are available in different bag size and weight condition like 40lb, 60lb bag, 80lb bag, 90lb bag and etc.

Regardless of size you need to calculate the volume of concrete in cubic yard or in cubic feet before ordering the mixed concrete. Volume is calculated by multiplying length, width and depth of slab. Here you have given a slab of 12 feet in length and 10 feet in wide, what is thickness of slab?, it’s depend on, is this a slab on the ground or it is elevated, rules differ for both, since failure of ground slab would not kill anyone whereas failure of an elevated slab could.

Thumb rules involves the safety factor that deciding the thickness of slab, 4 inch thick is generally for ground slab, heavy traffic and heavy load, you should take depth 5 or 6 inch thick and for an elevated slab generally thickness should be span/24, such as 12 feet/ 24 = 6 inch, 5″ and 4 inch thick is also made to use in normal conditions.

Generally standard thickness of slab is 4 inch thick in normal conditions, if 10×12 slab have heavy traffic and heavy load, you should take depth 5 or 6 inch thick. In this article we have to calculate required quantity of concrete in cubic yard & in cubic feet for a 10×10 (100 sq ft) slab at 4 inch, 5 inch or 6 inch thick.

Weight of Ready mix concrete in dry condition is about 133 lbs per cubic foot, 3600 lbs per cubic yard, or approximately equal as 2136 kg per cubic meter. The weight of concrete is determined by its density, which can vary based on the amount of aggregate, water, and air in the mix.

In United States, based on Imperial and US customary measurement system, 1 cubic yard is unit of measurement of volume represented by 3 feet long by 3 feet wide by 3 feet depth (3’×3’×3′ = 27 cubic feet), so 1 cubic yard is equal to 27 cubic feet.

**How many bags of concrete do I need for a 10×12 slab**

To determine the how much concrete do I need for a 10×12 slab & how many bags of concrete do I need for this, you can solve in following steps:-

Step 1 :- calculate the volume in cubic feet:- you have given 10×12 slab (length × width), consider it is 4 inch thick, 4 inch = 0.33 feet, to determine the volume of slab, you need to multiply all dimensions, such that = 10′×12′× 0.33′ = 39.6 cubic foot, at 5 inch thick, volume of slab is 10′×12′× 0.416 = 50 cubic foot and at 6 inch thick, volume of slab is 10′×12′× 0.5 = 60 cubic foot.

Step 2 :- converting cubic feet into cubic yard:- now converting into cubic yard, you should divide it by 27, so volume of concrete you needed for 10 ×12 slab at 4 inch thick in cubic yard = 39.6/27 = 1.46 cubic yards, at 5 inch thick = 50/27 = 1.85 cubic yards & at at 6 inch thick = 60/27 = 2.22 cubic yards.

Step 3:- add 10% extra which would be wastage during mixing and pouring.

Step 4:- to determine how many bags of concrete you will need, divide the total cubic yards needed by the yields, as you know premixed bag of concrete available in 40lb, 60lb, 80lb & 90lb. 40lb bag of concrete yields about 0.011 cubic yards, 60lb bag of concrete yields about 0.017 cubic yards, 80lb bag of concrete yields about 0.022 cubic yards and 90lb bag of concrete yields about 0.025 cubic yards.

**Number of bags of concrete for a 10×12 slab at 4 inch thick**

To determine how many bags of concrete you will need, divide the total cubic yards needed by the yields, at 4 inch thick, for a 10×12 slab you will need 1.46 yards of concrete, so number of 80lb bag of concrete = 1.46 ÷ 0.022 = 67 bags, No. of 60lb bag = 1.46 ÷ 0.017 = 86 bags, No. of 40lb bag = 1.46 ÷ 0.011 = 132 bags, No. of 90lb bag = 1.46 ÷ 0.025 = 59 bags.

**Number of bags of concrete for a 10×12 slab at 5 inch thick**

To determine how many bags of concrete you will need, divide the total cubic yards needed by the yields, at 5 inch thick, for a 10×12 slab you will need 1.85 yards of concrete, so number of 80lb bag of concrete = 1.85 ÷ 0.022 = 84 bags, No. of 60lb bag = 1.85 ÷ 0.017 = 109 bags, No. of 40lb bag = 1.85 ÷ 0.011 = 169 bags, No. of 90lb bag = 1.85 ÷ 0.025 = 74 bags.

**Number of bags of concrete for a 10×12 slab at 6 inch thick**

To determine how many bags of concrete you will need, divide the total cubic yards needed by the yields, at 6 inch thick, for a 10×12 slab you will need 2.22 yards of concrete, so number of 80lb bag of concrete = 2.22 ÷ 0.022 = 101 bags, No. of 60lb bag = 2.22 ÷ 0.017 = 131 bags, No. of 40lb bag = 2.22 ÷ 0.011 = 202 bags, No. of 90lb bag = 2.22 ÷ 0.025 = 89 bags.

Regarding this, **“how many bags of concrete do I need for a 10×12 slab?”**, at 4 inches thick, generally you will need approximately either 86 bags of 60lb or 67 bags of 80lb of premixed concrete for a 10×12 slab, at 5 inches thick slab, either 109 bags of 60lb or 84 bags of 80lb premixed concrete are required, while at 6 inches thick slab, either 131 bags of 60lb or 101 bags of 80lb premixed concrete is necessary.

**How much concrete do I need for a 10×12 slab**

Regarding this, “how much concrete do I need for a 10×12 slab?”, at 4 inches thick, generally you will need approximately 1.46 cubic yards or 39.6 cubic feet (either 86 bags of 60lb or 67 bags of 80lb) of premixed concrete for a 10×12 slab, at 5 inches thick slab, 1.85 cubic yards or 50 cubic feet (either 109 bags of 60lb or 84 bags of 80lb) of premixed concrete are required, while at 6 inches thick slab, 2.22 cubic yards or 60 cubic feet (either 131 bags of 60lb or 101 bags of 80lb) of premixed concrete is necessary.

**How many yards of concrete do I need for a 10×12 slab**

Regarding this, “how many yards of concrete do I need for a 10×12 slab?, its depend on thickness of slab, assuming at 4 inches slab, generally you will need 1.46 cubic yards of premixed concrete for a 10×12 slab, at 5 inches thick slab, 1.85 cubic yards of premixed concrete are required, while at 6 inches thick slab, 2.22 cubic yards of premixed concrete is necessary.

**How many cubic feet of concrete do I need for a 10×12 slab**

Regarding this, “how many cubic feet of concrete do I need for a 10×12 slab?, its depend on thickness of slab, assuming at 4 inches slab, generally you will need 39.6 cubic feet of premixed concrete for a 10×12 slab, at 5 inches thick slab, 50 cubic feet of premixed concrete are required, while at 6 inches thick slab, 60 cubic feet of premixed concrete is necessary.

**How many bags of 40lb concrete do I need for a 10×12 slab**

Regarding this, “how many bags of 40lb concrete do I need for a 10×12 slab?”, its depend on thickness of slab, assuming at 4 inches slab, generally you will need 132 bags of 40lb premixed concrete for a 10×12 slab, at 5 inches thick slab, 169 bags of 40lb of premixed concrete are required, while at 6 inches thick slab, 202 bags of 40lb of premixed concrete is necessary.

**How many bags of 60lb concrete do I need for a 10×12 slab**

Regarding this, “how many bags of 60lb concrete do I need for a 10×12 slab?”, its depend on thickness of slab, assuming at 4 inches slab, generally you will need 86 bags of 60lb premixed concrete for a 10×12 slab, at 5 inches thick slab, 109 bags of 60lb of premixed concrete are required, while at 6 inches thick slab, 131 bags of 60lb of premixed concrete is necessary.

**How many bags of 80lb concrete do I need for a 10×12 slab**

Regarding this, “how many bags of 80lb concrete do I need for a 10×12 slab?”, its depend on thickness of slab, assuming at 4 inches slab, generally you will need 67 bags of 80lb premixed concrete for a 10×12 slab, at 5 inches thick slab, 84 bags of 80lb of premixed concrete are required, while at 6 inches thick slab, 101 bags of 80lb of premixed concrete is necessary.

**How many bags of 90lb concrete do I need for a 10×12 slab**

Regarding this, “how many bags of 90lb concrete do I need for a 10×12 slab?”, its depend on thickness of slab, assuming at 4 inches slab, generally you will need 59 bags of 90lb premixed concrete for a 10×12 slab, at 5 inches thick slab, 74 bags of 90lb of premixed concrete are required, while at 6 inches thick slab, 89 bags of 90lb of premixed concrete is necessary.

**How many bags of concrete do I need for a 10×12 slab at 4″**

Regarding this, “how many bags of 90lb concrete do I need for a 10×12 slab at 4 inch thick?”, its depend on thickness of slab, at 4 inches thick, generally you will need approximately either 86 bags of 60lb or 67 bags of 80lb (1.46 cubic yards or 39.6 cubic feet) of premixed concrete for a 10×12 slab.

**How many bags of concrete do I need for a 10×12 slab at 5″**

Regarding this, “how many bags of 90lb concrete do I need for a 10×12 slab at 5 inch thick?”, its depend on thickness of slab, at 5 inches thick, generally you will need approximately either 109 bags of 60lb or 84 bags of 80lb (1.85 cubic yards or 50 cubic feet) of premixed concrete for a 10×12 slab.

**How many bags of concrete do I need for a 10×12 slab at 6″**

Regarding this, “how many bags of 90lb concrete do I need for a 10×12 slab at 6 inch thick?”, its depend on thickness of slab, at 6 inches thick, generally you will need approximately either 131 bags of 60lb or 101 bags of 80lb (2.22 cubic yards or 60 cubic feet) of premixed concrete for a 10×12 slab.