You have a Notion database formula that returns 0 even though the source property clearly contains a non-empty value. This usually happens when the formula references a property that is not the correct type, such as a number property that is blank or a text property that contains non-numeric characters. This article explains the root … Read more
Notion formulas do not include a switch or case function that exists in many programming languages. When you need to evaluate multiple conditions against a single value, you must build a chain of if() functions nested together. This article explains how to construct an if-else chain that works exactly like a switch statement. You will … Read more
You wrote a Notion formula that returns a value in one display mode, but shows undefined when you switch to another mode. This problem typically occurs because different display modes — such as Table, Board, or Gallery — handle empty or missing formula results differently. Notion formulas that depend on other database properties may return … Read more
You want to calculate compound interest directly inside a Notion database without using an external calculator. Notion formulas do not include a built-in compound interest function, but you can build one using exponentiation and repeated multiplication. This article explains the mathematical foundation and provides a working formula template for annual, semi-annual, quarterly, and monthly compounding … Read more
When you build a formula in a Notion database, you may find that referencing the property where the formula itself resides is not allowed. Notion formulas cannot read their own cell value or use the current property as an input. This limitation exists because a formula property is computed from other properties, not stored as … Read more
Notion Formula 2.0 introduced lambda functions, which let you transform each element in an array without writing complex nested formulas. Many users struggle with the syntax and scope of lambda expressions when applying them to database rollups or multi-select properties. This article explains what a lambda function is, how it works with array methods like … Read more
When you write a Notion formula that joins a number with text using the concat() function or the + operator, the output often displays the number as a text string instead of a numeric value. This happens because Notion automatically converts numbers to text when they are combined with strings in a formula. The result … Read more
You want to track how fast your team completes tasks over time and visualize whether velocity is increasing, decreasing, or staying flat. Notion formulas can calculate velocity as a numeric value, but building a formula that shows a trend direction requires combining date ranges, counts, and conditional logic. This article explains how to construct a … Read more
When you have a Notion database with hundreds or thousands of rows, formulas that once computed instantly can become slow. The page may freeze for seconds or even time out when you edit a formula property or filter the database. This lag happens because Notion recalculates every formula in every row every time the database … Read more
You want to display numbers in a Notion database as currency values with a custom symbol, decimal places, and thousands separators. The default property types in Notion do not offer a dedicated currency format setting. This article explains how to use the Notion formula format() function to convert raw numbers into a clean, custom currency … Read more