Online Drawing Board

Provides detailed explanations, syntax usage, and practical examples of common Excel formulas to help you quickly master Excel formula techniques.

Comprehensive Excel keyboard shortcuts reference with detailed usage scenarios, practical tips, and learning recommendations.

Powerful online drawing tool with multiple brush types, color selection, save records and download functionality. Provides brush, highlighter, eraser tools with undo/redo and work management.

Professional international tariff cost calculation tool to help you quickly estimate the impact of tariff policy changes on product costs, providing reference for international trade decisions.

Professional project progress management tool with milestone tracking, risk alerts, progress visualization and more.

Rich emoji picker with six categories including smileys, animals, food, travel, objects and symbols, supporting search and quick copy functionality.

Professional AI model training power consumption estimation tool. Calculate total power consumption, electricity costs, carbon emissions, and GPU power usage. Provides model presets and real-time calculation with comparison analysis.

Professional layoff compensation calculator that calculates compensation based on city coefficients and work experience. Supports major cities nationwide, provides real-time calculation and detailed breakdown to help you understand potential compensation amounts.

Professional BMI music licensing fee calculator for businesses. Calculate estimated annual licensing fees based on venue type, capacity, music usage type, and frequency. Provides detailed breakdown and important disclaimers.