How to Create Custom Functions in Coda

Updated on:

May 12, 2026

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Use this interactive demo to learn how to build custom formulas and named functions in Coda.

Quick summary

Custom functions in Coda let you write reusable named formulas that automatically update across your entire document. Use formula columns and combined expressions to add dynamic calculations to any table or canvas without repetitive manual edits.

Steps

In any table or canvas, type = to begin writing a formula.
Combine functions and columns however you want — for example, =If([Sales] > 1000, "Top Seller", "Regular").
Insert a formula column to add dynamic calculations to your table.
Name your formula (for example, "DiscountRate") and define the formula logic inside it.
Finalize your smart doc with all your customized formulas and interactive elements.
Edit your Named Formula to automatically update everywhere it is used across the document.

📌 Why this matters

Custom functions in Coda eliminate the need to rewrite the same formula logic across multiple tables and canvases. By creating reusable named formulas, teams can enforce consistent calculation logic — such as discount rates or sales thresholds — that updates automatically everywhere the formula is referenced. This makes Coda a powerful alternative to spreadsheets for teams that need dynamic, self-maintaining documents. For operations, sales, and finance teams, custom functions dramatically reduce manual errors and save time when business rules change.

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