To calculate the amount of aluminum profiles needed for your building project, first, measure the dimensions of the area where the profiles will be used. Determine the length and width of each profile required. Multiply these dimensions by the number of profiles needed for each section of the project. Add up the totals for all sections to get the overall quantity. Consider the type of profile and its application, as this will affect the quantity and specification. Factor in a small percentage for waste and cutting errors. For complex projects, consult with an engineer or use specialized software to ensure accuracy.