# How to Create Custom Functions in Coda

> To create custom functions in Coda, type an equals sign to begin a formula, combine functions and columns, and insert a formula column for dynamic calculations. Name your formula and define it, finalize your smart doc with customized formulas and interactive elements, and edit your named formula to automatically update everywhere.

Canonical: https://livedemo.ai/tutorials/how-to-create-custom-functions-in-coda/
Apps: Coda
Updated: 2026-10-05
Interactive demo: https://story-api.livedemo.ai/workspaces/62255d3d3304f17b8f5e2d03/stories/692a3968ab56e05a00fdfc54/preview?step=1

## Steps

1. In any table or canvas, type = to begin writing a formula.
2. Combine functions and columns however you want.
3. Insert a formula column to add dynamic calculations to your table.
4. Name it (example: "DiscountRate") and define the formula inside.
5. Finalize your smart doc with all your customized formulas and interactive elements.
6. Edit your Named Formula to automatically update everywhere it’s used.