Determinant Calculator by Ease Tools is an online utility designed to compute the determinant of square matrices. The tool supports calculations for 2x2, 3x3, and 4x4 matrices and returns accurate numeric results through a web interface. The calculator accepts matrix dimensions up to 4x4, allowing users to input values for each cell. Once the matrix is populated, the tool performs the determinant calculation and displays the result. The interface is browser-based and requires no installation. Users navigate to the dedicated page, select the desired matrix size, enter the numerical values into the provided grid, and trigger the calculation. The determinant value is then presented on screen. The primary benefit is the elimination of manual determinant computation, reducing arithmetic errors and saving time for students, educators, and professionals who work with linear algebra problems. The tool is accessible from any device with internet access. Determinant Calculator is offered free of charge and operates entirely within the browser, making it suitable for quick classroom demonstrations, homework verification, and on-the-fly engineering checks.