The Calculite plugin adds a lightweight calculator directly into your workspace for quick math operations like adding shopping lists, calculating averages, or working out reps. It supports basic arithmetic and remembers the current equation even if you close and reopen Obsidian. You can access it through a ribbon icon, command palette, sidebar toggle, or as a floating window on desktop that works system-wide. Hotkeys are mapped to match Windows and macOS calculators, offering a familiar experience.