This project has been implemented as a degree of Bachelor of Science education in Mechanical Engineering at the University of Karlstad during the spring of 2016. The work has been carried out by Hannah Jordansson, a student at the Faculty of Health, Nature and Technology science. The main task of the project was to develop a calculation program in Excel for industrial conveyors for the company ÅF Industry. ÅF Industry requested a calculation program to use as a tool when building the conveyors. The conveyors consist of two different types, one rolling conveyor and one chain conveyor. The two types will be developed separately in the calculation program. The goal with the work was to build a program that will give the user the right outputs from certain inputs. The desired outputs from ÅF Industry for both conveyors was the deflection of the trolley tracks, if needed a cross beam and also information about the required drive. During the development of functional calculation program the work began with preparing all the equations needed. The equations were then put together and evaluated. When all of the equations were approved they were put in and performed in Excel. The calculation program is completed, tested and evaluated. The program has been formed to a layout that meet ÅF Industry’s requests.