Length x width x thickness. Add 5-10 additional material Always buys more concrete then you think youll need. Concrete Calculator How Much Concrete Do I Need The Concrete Network Concrete Calculator Concrete Concrete Bags There are 27 cubic feet in a cubic yard. . To determine how many bags of concrete you will need divide the total cubic yards needed by the yield. 2 This will ensure you can complete your project in a single pour without needing to order a short load pay crew overtime and risk a cold joint that all can occur if you come up short. Hence the number of bags of 60 pound concrete in one cubic yard 360060 60 implying that one cubic yard contains 60 bags of 60 pound concrete. An 80-pound bag yields 022 cubic yards. All yields are approximate and do not include allowance for uneven subgrade waste etc Enter Number of Bricks or Blocks Desired. So 27 06 45 80 bags. There are 27 cubic feet in a cubic ...