Composition · Chart 10 of 11
Treemap
Nested rectangles sized by value — composition with hierarchy.
Live exampleSample data
Use it when
- 10+ categories that form a whole
- Hierarchy (category → subcategory)
- When relative size is the message
Avoid it when
- Precise comparison of similar sizes
- When a sorted bar would be clearer
Common mistakes
- 1Too many tiny boxes nobody can read
- 2Colour used decoratively, not meaningfully
In business
Revenue by category, budget by department, storage by folder.