Dosage of concrete in the Work; Calculate the amounts of cement, gravel, sand and water required according to the proportions 1:x:x for a given compressive strength fc at 28 days.- The application asks you for an input data that you have on site, it can be the data of volume of gravel or volume of sand or weight of cement or volume of the structure.-The results obtained are: -cement in kilograms. -sand and gravel in cubic meters or cubes. -sand and gravel in cubic meters or cubes. -water in liters. -cement in number of bags. -sand and gravel in litres. -sand and gravel in quantity of buckets. -sand and gravel in quantity of wheelbarrows. -sand and gravel in quantity of shovels.