This App is a basic tool for builders and amateurs, which allows you to calculate the amount of materials such as sand, cement, gravel and water according to the strength and/or dosage of the concrete; necessary in the elaboration of a given volume of concrete, based on its dimensions: width (front), length (depth) and height (thickness). Applicable to volumes with rectangular or square edges such as: a concrete plate, a square section column, beam, slab, etc.