Systems and methods for generating customized calculation execution graphs for producing analysis and reports from large stores of data are disclosed. The customized calculation execution graphs are instantiated from user supplied calculation definition tables and calculation input definition tables. The calculation definition tables and the calculation input definition tables are instantiated to produce a calculation graph model. The calculation definitions of the calculation graph model can be sorted based on the number of intermediate calculations required as input for each one of the defined calculation. The sorting calculation graph model can then be instantiated to generate the calculation execution graph. Such calculation execution graphs include a number of ordered calculation nodes with pairwise connections indicating the order of operations and data flow. The calculation execution graph can then be instantiated into a platform specific application programming language to run on a variety of server and client computers.