When should I use a icicle chart?

Showing hierarchical breakdowns where label readability matters ● When a rectangular layout is preferred over radial sunbursts

When should I avoid a icicle chart?

When the hierarchy is very deep (rectangles get too narrow) ● When there is no meaningful hierarchy in the data

What are common mistakes with icicle charts?

Using too many hierarchy levels, making text illegible ● Not ordering children by size for easier scanning

What data does a icicle chart need?

Minimum 5 rows, 2 columns (string, number). Hierarchy must be encoded as a parent reference column (or path string) — a flat string+number table is not enough.

Part-to-Whole

Icicle Chart

A rectangular, space-filling hierarchy chart where nested rectangles hang vertically to show depth and proportion.

Budget Allocation Hierarchy

Three-level breakdown: division to team to line item

View data (18 rows)

Chart data table: Budget Allocation Hierarchy
Category	Value	Parent
Total Budget	1000
Operations	450	Total Budget
Staffing	280	Operations
Salaries	200	Staffing
Benefits	80	Staffing
Infrastructure	170	Operations
Cloud	110	Infrastructure
Office	60	Infrastructure
R&D	350	Total Budget
Lab Equipment	200	R&D
Microscopes	130	Lab Equipment
Reagents	70	Lab Equipment
Software	150	R&D
Licenses	90	Software
SaaS	60	Software
Marketing	200	Total Budget
Digital Ads	130	Marketing
Events	70	Marketing

Make an icicle chart with your data

Use an icicle chart when…

Showing hierarchical breakdowns where label readability matters
When a rectangular layout is preferred over radial sunbursts

Avoid when…

When the hierarchy is very deep (rectangles get too narrow)
When there is no meaningful hierarchy in the data

Data it needs

Property	Value
Min Rows	5
Min Columns	2
Column Types	stringnumber
Notes	Hierarchy must be encoded as a parent reference column (or path string) — a flat string+number table is not enough.

Visual anatomy

Marks

rectangle

Channels

width (proportion)vertical position (depth)color (category)

Axes

Guiding principles

Consider instead

Sunburst Chart

When a compact radial layout is preferred

Nested Donut

When only 2-3 levels exist and radial feels natural

Common mistakes

Using too many hierarchy levels, making text illegible
Not ordering children by size for easier scanning

History

Icicle plots are a partition-based hierarchy visualization introduced by Kruskal & Landwehr (1983); they share the partition algorithm with treemaps but use a layered rectangular layout that reads top-down.

Accessibility notes

Provide an indented text list; ensure each rectangle has an accessible name and value.

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