# Formula Reference

Spread for WinForms provides advanced software components that support Excel import/export, full cell customization, an extensive calculation engine with over 450 functions and more, all with zero dependencies on Excel.

## Content

Spread.NET products provide extensive calculation ability through formulas. With over 500 built-in functions, standard formula operators, and the ability to create custom functions, you can define and perform calculations for a range of data within any of several sheets in a spreadsheet component.
This reference provides an introduction to the use of formulas as well as a complete list of built-in functions. This documentation includes:

* [Formula Overview](/spreadnet/docs/latest/online-formula/formulas-overview)
* [Formula Functions](/spreadnet/docs/latest/online-formula/formulas-functionsall)

For more information on using formulas in cells and creating custom functions, refer to the product [Developer's Guide](https://developer.mescius.com/spreadnet/docs/latest/online-win/spwin-devguide.html).
For a complete list of documentation, return to the [product documentation](https://developer.mescius.com/spreadnet/docs/latest/online-win/overview.html) page.