This document describes a web application called the Course Outcome Attainment Estimation System. The system allows faculty to accurately calculate course outcome attainment percentages and reduces the time required compared to manual calculations. Student continuous assessment marks, assignment marks, and other data are entered and stored in a database. The system then calculates individual course outcome percentages and graphs. It generates the overall course outcome attainment percentage using direct internal and external assessment marks. The objectives are to create an easy-to-use system that accurately calculates results with less time than manual methods. It also allows storing and printing results for future use.