Focus Grade Calculator is a Chrome extension designed for students using the Focus School Software gradebook system. This free tool allows users to simulate potential assignment outcomes, providing insights into how hypothetical grades impact overall performance. Key features include support for both weighted and unweighted grading modes, as well as the ability to account for extra credit, making it versatile for various grading scenarios.

The extension enhances user experience with visual feedback, highlighting recalculated grades for easy understanding. All calculations are performed locally, ensuring user privacy and security. With simple operation steps, students can quickly assess their academic standing and set achievable grade goals. This tool is ideal for planning ahead and understanding the implications of assignment results without affecting actual grades.