> For the complete documentation index, see [llms.txt](https://docs.notionapps.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.notionapps.com/screens-and-components/formulas-and-rollups.md).

# Formulas & Rollups

## Lists

You can choose to show formula and rollup properties in Lists like List (*View Items) screen, List (Update Items) screen, List Component, Page Selector Component, etc.*

However, you need to be aware of a limitation:

{% hint style="warning" %}
When you choose a property to view in the lists that is a rollup or formula dependent on a rollup, and if the formula is calculated over more than 25 related pages, Notion provides ***NotionApps*** results based on only the top 25 related pages.

*For example,*

Let's say there are two databases:

* `Projects` and `Tasks`.
* `Projects` has a relation to `Tasks.`
* `Projects` has a rollup property that counts the number of `tasks` linked to a `project`.

**Incomplete Data**

If a `project`is linked to 30 `tasks (> 25),`NotionApps will only receive the property value as 25 (`incomplete value`).

**Complete Data**

If a `project` is linked to `10 tasks`, NotionApps will receive `10 (correct value)`.
{% endhint %}

## Components

Rollups & Formulas can be shown in all components.

{% hint style="success" %}
However, for properties where there might be incomplete data`(> 25 related pages)`, we suggest showing them in the Details (*View One Item)* or Form (*Update One Item)* screens.

On these screens, when using a "View Text" component to view the property, you will see a refresh button next to it.

On clicking the refresh button, we fetch the complete property data from Notion.
{% endhint %}

<figure><img src="https://4233028229-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5ZqDXcVVffWUqEIZVhmn%2Fuploads%2FeBH7RLQckPaH30RB52me%2Fformula-view-text-comp%20copy.png?alt=media&#x26;token=45efd1c0-c595-41d3-b7bd-0b2bc8c97308" alt=""><figcaption></figcaption></figure>

We are working with Notion to make this experience better. Meanwhile, if you have questions, please reach out to us via our website chat or email us at <help@notionapps.com>.