GST Calculator Pro is a professional tax calculation tool designed specifically for businesses and individuals. This extension provides instant, accurate GST calculations for all standard rates (5%, 10%, 15%, and 20%). Key Features: - Quick GST calculations for both inclusive and exclusive amounts - Support for all Australian GST rates - Real-time calculation as you type - Professional, user-friendly interface - Detailed breakdown showing formulas used - Keyboard shortcuts for faster operation Visit calculatorgst.com.au for additional tax calculation tools and resources.