Concrete calculators are available at Calculator.net, ConcreteNetwork.com, CalculatorSoup.com and AdvanceReadyMix.com, as of 2015. These websites provide free software applications that determine an estimated amount of concrete necessary for specific projects.
Manually calculate concrete amounts in cubic yards for square or rectangular areas by multiplying the length by the width by the depth and dividing by 27. Convert all measurements to the units of feet before calculating. Multiply the total cubic yards by 1.05 to allow 5 percent for errors.
The formula for concrete calculations is (length x width x depth) divided by 27. The result of this formula provides the number of cubic yards of concrete needed. The measurements must be in feet in order for the equation to work.
Calculate the number of cubic yards of concrete by calculating the volume of the pour and adding 10 to 15 percent to ensure you have enough material. If you calculate volume in cubic inches or cubic feet, use a conversion factor to convert the volume to cubic yards.
Calculate the number of concrete blocks needed for a project by determining the number of blocks to complete a row and the rows to reach the desired height. Standard blocks are 8 inches by 16 inches, including the mortar joints.
Concrete is composed of aggregates, which can be any or a combination of sand, gravel or rocks that is held together by cement. The cement itself, when mixed with water, serves as a paste that holds all the components of the concrete together once the cement sets and hardens.
A concrete slab calculator works by calculating the amount of concrete needed in cubic feet by multiplying together the values in feet for the length, width and depth of the concrete slab. The result is divided by 27 to get cubic yards.
There are 45 80-pound bags and about 60 60-pound bags of concrete in a cubic yard. Each 80-pound bag of concrete covers about 0.6 cubic feet. There are 27 cubic feet in a cubic yard: 27/.6 = 45.
Types of concrete include normal concrete, high-strength concrete, high-performance concrete, air-entrained concrete, lightweight concrete and pervious concrete. Each type is distinguished by strength level, weight and other unique features.
The price for ready-mix concrete, on average as of 2015, is $93 per cubic yard. However, there are many factors that contribute to the final price, such as grading, subbase preparation, concrete forms and reinforcement.