公式计算器 - 自定义公式

Turn inspiration into a reliable calculator. The formula calculator supports "custom formulas + variables + functions + units" and is applicable to learning, engineering, finance, science, and daily scenarios.
[Core Features]
• Create a custom calculator
- Set friendly Chinese names and default values for input parameters
- Select units (kg, m, yuan, etc.) to make the results clearer
- Write expressions using common mathematical functions
- Control the number of decimal places for precise output
- Preview results in real-time while inputting
• Systematic management
- Classify formulas with tags (geometry, statistics, BMI, physics, finance, etc.)
- Search the entire site and find the required formula in seconds
- Support sorting by name, time, or custom order
- Reuse sub-formulas to make complex projects clearer
• Completely save history
- Automatically save each calculation to the history record
- Recalculate with one click
- Export data when needed
- Keep progress across sessions
• Built-in date calculator
- Calculate the number of days before/after a certain date
- Calculate the number of days between two dates
- More convenient for planning trips and deadlines
[Applicable Scenarios]
- Students - Calculate for subjects such as geometry, physics, and statistics
- Engineers - Calculate professional engineering formulas
- Finance - Calculate compound interest, ROI, and loans
- Daily life - Calculate BMI, cooking conversions, and date planning
The interface is simple, the feedback is immediate, and the functions are powerful. This is the "formula calculator" you will use every day. Build it once and reuse it for a long time.