EA Extension is a software module for Elemental Analysis. Determining the Carbon, Hydrogen, Nitrogen, Oxygen, and Sulphur (CHNS-O) content of unknowns is one of the most basic and essential needs of any chemist. EA Extension provides a simplified version of the Clarity user interface that speeds up the workflow with elemental analyzers equipped by autosamplers. EA Extension is an optional addition to Clarity software, it cannot be used as a standalone program. Its user interface is optimized for maximum efficiency in repetitive tasks. Using features that are specific to EA Analysis, such as Standard Table, automatic weight input from analytical balance and other improvements, EA Extension provides an interactive and automated tool for determining the Carbon, Hydrogen, Nitrogen, Oxygen, and Sulfur (CHNS-O) content of unknowns.