![]() We need 4 cubic yards of concrete our producer sells concrete in bags weighing 60 lb with a 150 lb/cu ft density. In our example, let's leave the default measures. Experienced contractors usually assume 5-10%. To be safe, account for spillage and waste.If not, again, change it to the appropriate number. Check if the weight of a single bag of concrete is the same as the default already given (60 lb).Now, the total weight of concrete you need is shown.Check if the density of the concrete from a particular producer is the same as the default value in our calculator (150 lb/cu ft).Once we have the above measurements, we can get to the essence of the matter. In our example, we are paving 36 square feet. ![]() Other times, you'll just know the area that needs to be paved - feel free to provide any of these values. Sometimes, you'll know how many slabs you need. To learn more about cubic yards, visit our cubic yard calculator. As construction elements are usually measured in feet, our calculator converts the volume into cubic yards - in our example, 4 cu yd (108 cubic feet). Pre-mixed concrete is usually sold by the cubic yard, and this unit is used by default. So let's say we have 4 concrete elements, each 3 feet long, 3 feet wide, and 3 feet high. You can change them to any other unit by simply unlocking the field (the padlock button). Now you know how many bags you truly need.Īll dimensions are given in feet by default. Provide the size of the bag so we can find out how much concrete is produced per bag.įinally, you can provide the waste ratio - how much you think you will lose via spillages, defective elements, and other unfortunate events. Given the volume we just calculated and the concrete's density (again, you'll find this info on the bag we provided a common value, but it varies), you can calculate the weight of all your elements. Provide the dimensions (length, width, and height) and quantity of your concrete slabs or an area that you want to pave.ĭetermine the weight of all of those elements - this is how bagged concrete is sold they tell you how much the concrete from the bag will weigh (for example, you'll get 60 pounds of concrete out of one bag). It's great we have all the technology to calculate, figure and make estimating concrete and block walls easier but sometimes it's still good to figure block materials on paper to double check yourself, just because the calculator says so, doesn't mean you could have punched in the wrong number somewhere.First, you need to estimate the volume of concrete that you need. Here is how you can calculate the amount of block needed the old fashioned way using a pencil and paper:ģ Bags Mortar per 100 Block (35 Block per Bag) ![]() Then from there the block calculator will figure mortar bags needed for a specific block count, the amount of sand needed, the amount of block wall reinforcing needed, the cubic yardage required to fill the blocks and the amount of zonolite bags needed to fill the concrete blocks.Ĭemex offers this cement block calculator, clicking on it will bring you to their website.Ĭ has this concrete block volume calculator that figures the amount of concrete needed to fill the blocks. For a given length and height it will give you the total block required. Use this concrete calculator to estimate the amount of concrete blocks needed to complete a project. The calculator will figure the amount of block and related materials fast and quite accurate. A concrete block calculator really helps when doing an estimate or a proposal for a concrete masonry wall.
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