Download Article Show Download Article Before beginning any concrete placement job, it is important to determine the correct volume of concrete needed for the job. An insufficient amount of concrete may cause you to have to make a concrete placement in 2 separate steps, which will create a structurally weak seam between the 2 placements. Too much, on the other hand, may be a waste of money. Fortunately, figuring out a project's concrete yardage is usually a simple matter of calculating the volume of the space to be spilled and then adding 5-10% to this number to be conservative. For basic concrete placements calling for concrete to be poured into a rectangular 3-D area, calculating volume is done with the equation length × width × height.[1]
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ReferencesAbout This ArticleArticle SummaryX To figure concrete yardage, start by breaking your project up into multiple rectangular prisms. Then, convert all of the measurements for each prism to the same unit, and find the volume of each prism by multiplying its length, width, and height. Next, convert the volumes into cubic yards or cubic meters since that's how concrete is measured. Finally, add up the volume of each prism to find your total concrete yardage. To learn how to quickly figure concrete yardage for basic slabs, scroll down! Did this summary help you? Thanks to all authors for creating a page that has been read 240,989 times. Reader Success Stories
Did this article help you?How many yards of concrete do I need for a 24x24 x4 slab?For an approximate idea of how much concrete you need, use the Concrete Volume Calculator below. For example, for a concrete slab that is 24' X 24' X 4”, simply enter 4 in the Thickness/Depth field, 24 in the Width field, and 24 in the Length field. Click “Calculate”. Your answer should be 7.11 yards.
What is the formula for calculating concrete?Calculating the volume for concrete requires using three dimensions: length times width (which is area) times the height (thickness) or L x W x H. If you are using feet as your standard unit of measurement, this formula will give you the volume of concrete in cubic feet.
How many yards are in a 10x10 concrete slab?The amount you will need for a 10 x 10 slab is 1.3 cubic yards, we always add an extra 10% to allow for any slab depth variations or spills that may occur. This is what your typical concrete contractor in Elk Grove does every day.
How many yards of concrete do I need for a 20x20 slab?Step 2 :- converting cubic feet into cubic yard:- now converting into cubic yard, you should divide it by 27, because 1 cubic yard = 27 cubic foot, so volume of concrete you needed for 20×20 slab at 4 inch thick in cubic yard = 132/27 = 4.88 cubic yard.
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