Rollup Calculations
Rollup calculations aggregate and compute metrics (sum, count, average, etc.) from related records in Notion databases for real-time insights.
Definition
Rollup calculations are a database property in Notion that let you aggregate and compute values from records linked via Relation properties. You choose which property of the related records to summarize—such as numbers, dates, or text—and apply functions like sum, average, count, min, or max to generate a single value displayed in your current database. These calculations update automatically as you add, remove, or modify related records, providing live summaries across tables. Rollups rely on Relations to establish links between databases, making it easy to build dashboards, track project progress, or analyze grouped data without manual effort.
Usage & Context
To use rollup calculations, first create a Relation property connecting two databases (for example, tasks to projects). Then add a Rollup property in one of the tables, select the Relation as the source, pick the target property you want to summarize, and choose a calculation function (sum, count, average, etc.). Notion will display the aggregated result in each record of your current database. Rollup calculations are ideal when you need quick overviews—such as total hours spent on a project, count of completed tasks, or earliest due date—without switching between tables. You can also combine rollups with filters, sorts, and groups to build custom reports and dashboards directly in your workspace.
Frequently Asked Questions
- What is a rollup calculation in Notion?
- A rollup calculation aggregates values from related records in another database property, using functions like sum, count, or average.
- How do I add a rollup calculation property?
- In your database, click "+ Add a property," choose Rollup, select the Relation property as the source, pick the property to aggregate, and choose a function.
- Which functions are available in rollup calculations?
- Notion supports functions such as sum, average, count, min, max, range, and percent empty/non-empty for rollups.
- Why is my rollup showing no data?
- Ensure your Relation property is linking records correctly and that the target property has compatible data types. Filters on the rollup may also limit visible values.
- Can rollups summarize text or dates?
- Yes. While numeric functions apply only to numbers, rollups can return earliest/latest dates or summarize text by listing or counting unique entries.
Benefits
Rollup calculations save time by automatically summarizing linked data across tables, giving you real-time insights for project tracking, reporting, and decision-making without manual updates.
Related Terms
Rollup
A database property that aggregates values from related records using Relation fields. Summarize data like sums, counts, averages, and specific properties across databases.
Relation
A Relation property in Notion links records between databases, letting you connect and view associated items across tables for richer, interlinked workflows.
Formula
A database property that calculates and transforms values using functions. Create dynamic outputs like dates, text manipulation, logical checks, and math operations.
Conclusion
Rollup calculations are a powerful Notion feature that transform raw relational data into actionable summaries. By automating aggregation across linked databases, they help teams stay informed, spot trends, and maintain clarity in complex workflows.
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