# Formula Reference

## Content

SpreadJS provides extensive calculation ability through formulas. With over 450 built-in functions and standard formula operators, you can define and perform calculations for a range of data within any of several sheets in a spreadsheet widget.

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](/spreadjs/docs/v17/formulareference/formulaoverview)
* [Formula Functions](/spreadjs/docs/v17/formulareference/FormulaFunctions)