How many bags of concrete do i need for 10 cubic feet | how many bags of concrete do i need for 3 cubic feet | how many bags of concrete do i need for 5, 12, 10, 6, 2 and 2.5 cubic feet | how many bags of concrete make a cubic foot.

A bag of ready mix concrete is made of blended mix of Portland cement, gravel (coarse aggregate), sand (fine aggregate) and other approved ingredients or admixture. Different admixture are added to improve its workability. In US, dry ready mix concrete are packed in different bag size and weight in pounds such as smaller bag of 40lb (pounds) and 50lb (pounds), medium are of 60lb (pounds) bag, and larger are of 80lb and 90lb bag.

If you want to install concrete slab, first thing is to know about depth of slab and square footage of slab. Regardless of premixed concrete bag size, you need to figure out the volume of concrete in cubic yards or in cubic feet or in cubic meters or in RMC truckload before ordering the mixed concrete.

Volume of concrete slab is calculated by multiplying length, width and depth of slab. What is thickness of slab?, Generally depth of slab is kept between 3″ to 6″, but we recommend 4 inches depth of slab is better for normal weight condition. Although 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.

As per general practices and thumb rules involves the safety factor that deciding the thickness of slab. 4 inches thick depth is generally for ground slab, for heavy traffic and heavy load, you should take depth 5 or 6 inches thick and for an elevated slab generally thickness should be 5″ to 6″, and 4 inch thick is also made to use in normal weight conditions.

Standard thickness of slab is kept 4 inches thick in normal weight conditions, if slab have heavy traffic and heavy load, you should take depth of 5 or 6 inches thick. In this article we have to figure out quantity of concrete bags required for 10 cubic feet.

A typical Ready mix concrete in dry condition is weigh about 133lb (pounds) per cubic foot, or 3600lb (pounds) per cubic yard, or which is approximately equal as 2136kg per cubic meter. The weight of ready mix concrete is determined by its density, which can vary based on the amount of gravel, sand, cement, small amount of water, and air in the mix.

In United States, based on Imperial and US customary measurement system, 1 cubic yard of concrete is unit of measurement of volume , which is visually represented by 3 feet long by 3 feet wide by 3 feet depth, so, 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 10 cubic feet**

To determine how many bags of concrete do I need for 10 cubic feet, concrete bag calculator formula help you in following: Divide the total cubic feet needed by the total cubic feet that can be made from one bag of Quikrete, or Sakrete concrete Mix.

Quikrete’s or Sakrete concrete mix yield’s about 0.15 cubic feet for every 20 pounds of mix, so a 40-pound bag yields 0.30 cubic feet, 60 pounds of concrete mix yields 0.45 cubic feet and an 80-pound bag yields 0.60 cubic feet. One 50-pound bag of Quikrete Fast Setting Concrete Mix yields about .375 cubic feet.

For example, if you need to cover 10 cubic feet, using 60-pound bags of concrete, divide 33.333 cubic feet by 0.45 cubic feet to get 23 total bags of concrete.

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In order to have enough concrete to make a cubic foot, you’ll need either 3.33 bags of 40lb, or 2.2 bags of 60-lb, or 1.66 bags of 80lb concrete. Since bags are only sold in whole (not half, or quarter) quantities, you’ll need to purchase either three (3) 60-lb, or four (4) 40-lb, or two (2) 80-lb bags for one cubic foot.

**Number of bags of concrete for 10 cubic feet**

●1) No. of 80lb bags of concrete = 10÷0.60 = 16.66 bags, in whole equal to 17 bags

●2) No. of 60lb bags of concrete = 10÷0.45 = 22.22 bags, in whole equal to 23 bags

●3) No. of 40lb bags of concrete = 10÷0.30 = 33.33 bags, in whole equal to 34 bags

As per general practices, you will need either seventeen (17) 40-lb, or twenty three (23) 60-lb, or thirty four (34) 80-lb bags of Quikrete’s or Sakrete concrete mix for 10 cubic feet. Maths calculation:- 1) No. of 80lb bags = 10÷0.60 = 16.66 bags, in whole equal to 17 bags, 2) No. of 60lb bags = 10÷0.45 = 22.22 bags, in whole equal to 23 bags, and 3) No. of 40lb bags = 10÷0.30 = 33.33 bags, in whole equal to 34 bags.

**How many bags of concrete make a cubic foot**

As per general practices, you will need either four (4) 40-lb, or three (3) 60-lb, or two (2) 80-lb bags of Quikrete’s or Sakrete concrete mix to make a cubic foot. Maths calculation:- 1) No. of 80lb bags = 1÷0.60 = 1.66 bags, in whole equal to 2 bags, 2) No. of 60lb bags = 1÷0.45 = 2.22 bags, in whole equal to 3 bags, and 3) No. of 40lb bags = 1÷0.30 = 3.33 bags, in whole equal to 4 bags.

**How many bags of concrete do i need for 2 cubic feet**

As per general practices, you will need either seven (7) 40-lb, or five (5) 60-lb, or four (4) 80-lb bags of Quikrete’s or Sakrete concrete mix for 2 cubic feet. Maths calculation:- 1) No. of 80lb bags = 2÷0.60 = 3.33 bags, in whole equal to 4 bags, 2) No. of 60lb bags = 2÷0.45 = 4.44 bags, in whole equal to 5 bags, and 3) No. of 40lb bags = 2÷0.30 = 6.66 bags, in whole equal to 7 bags.

**How many bags of concrete do i need for 2.5 cubic feet**

As per general practices, you will need either nine (9) 40-lb, or six (6) 60-lb, or five (5) 80-lb bags of Quikrete’s or Sakrete concrete mix for 2.5 cubic feet. Maths calculation:- 1) No. of 80lb bags = 2.5÷0.60 = 4.16 bags, in whole equal to 5 bags, 2) No. of 60lb bags = 2.5 ÷0.45 = 5.55 bags, in whole equal to 6 bags, and 3) No. of 40lb bags = 2.5 ÷0.30 = 8.33 bags, in whole equal to 9 bags.

**How many bags of concrete do i need for 3 cubic feet**

As per general practices, you will need either ten (10) 40-lb, or seven (7) 60-lb, or five (5) 80-lb bags of Quikrete’s or Sakrete concrete mix for 3 cubic feet. Maths calculation:- 1) No. of 80lb bags = 3÷0.60 = 5 bags, 2) No. of 60lb bags = 3 ÷0.45 = 7 bags, and 3) No. of 40lb bags = 3 ÷0.30 = 10 bags.

**How many bags of concrete do i need for 3.5 cubic feet**

As per general practices, you will need either twelve (12) 40-lb, or eight (8) 60-lb, or six (6) 80-lb bags of Quikrete’s or Sakrete concrete mix for 3.5 cubic feet. Maths calculation:- 1) No. of 80lb bags = 3.5÷0.60 = 5.83 bags, in whole equal to 6 bags, 2) No. of 60lb bags = 3.5 ÷0.45 = 7.77 bags, in whole equal to 8 bags, and 3) No. of 40lb bags = 3.5 ÷0.30 = 11.66 bags, in whole equal to 12 bags.

**How many bags of concrete do i need for 4 cubic feet**

As per general practices, you will need either fourteen (14) 40-lb, or nine (9) 60-lb, or seven (7) 80-lb bags of Quikrete’s or Sakrete concrete mix for 4 cubic feet. Maths calculation:- 1) No. of 80lb bags = 4÷0.60 = 6.66 bags, in whole equal to 7 bags, 2) No. of 60lb bags = 4 ÷0.45 = 8.88 bags, in whole equal to 9 bags, and 3) No. of 40lb bags = 4 ÷0.30 = 13.33 bags, in whole equal to 14 bags.

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**How many bags of concrete do i need for 5 cubic feet**

As per general practices, you will need either seventeen (17) 40-lb, or twelve (12) 60-lb, or nine (9) 80-lb bags of Quikrete’s or Sakrete concrete mix for 5 cubic feet. Maths calculation:- 1) No. of 80lb bags = 5÷0.60 = 8.33 bags, in whole equal to 9 bags, 2) No. of 60lb bags = 5 ÷0.45 = 11.11 bags, in whole equal to 12 bags, and 3) No. of 40lb bags = 5 ÷0.30 = 16.66 bags, in whole equal to 17 bags.

**How many bags of concrete do i need for 6 cubic feet**

As per general practices, you will need either twenty (20) 40-lb, or fourteen (14) 60-lb, or ten (10) 80-lb bags of Quikrete’s or Sakrete concrete mix for 6 cubic feet. Maths calculation:- 1) No. of 80lb bags = 6÷0.60 = 10 bags, 2) No. of 60lb bags = 6 ÷0.45 = 13.33 bags, in whole equal to 14 bags, and 3) No. of 40lb bags = 6 ÷0.30 = 20 bags.

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**How many bags of concrete do i need for 12 cubic feet**

As per general practices, you will need either fourty (40) 40-lb, or twenty seven (27) 60-lb, or twenty (20) 80-lb bags of Quikrete’s or Sakrete concrete mix for 12 cubic feet. Maths calculation:- 1) No. of 80lb bags = 12÷0.60 = 20 bags, 2) No. of 60lb bags = 12 ÷0.45 = 26.66 bags, in whole equal to 27 bags, and 3) No. of 40lb bags = 12 ÷0.30 = 40 bags.

**Conclusions:-**

You will need either seventeen (17) 40-lb, or twenty three (23) 60-lb, or thirty four (34) 80-lb bags of Quikrete’s or Sakrete concrete mix for 10 cubic feet.