Abstract: Systems and methods are provided to assist users with calculating data related to a proposed or actual prison sentence. A sentence calculation platform provides a plurality of sentences calculators. Each sentence calculator is associated with a particular algorithm and a set of instructions for determining sentence output data based on the applicable legal framework. A sentence calculation module corresponding to a selected sentence calculator is transmitted for display on a client device of a user. User input is entered in an input portion of the module. Sentence output data is generated by applying the selected sentence calculator to the received user input. The sentence output data is transmitted for display in an output portion of the sentence calculation module displayed on the client device.