If hand mixing its inadvisable to exceed a water to cement ratio of 055 which translates to 55 pounds of water for every 100 pounds of cement. T This will ensure you can complete your project in a single pour without needing to get more concrete to complete the project if youre short. Learning how to calculate the amount of concrete needed is easy when using our concrete formula and online concrete calculator.
Then you may need to know how many bags of concrete youll need in order to cover the area.
Length x width x thickness. Basically you need to find out the volume and convert the result into cubic yards. If you divide 393 cubic feet by 27 39327 146 cubic yards. Calculate and the answer is 008 cubic yards for one concrete tube.