Dual-axis data encoding
Encode two independent variables at once: column width for total category size and segment height for proportional share within each category.
Marimekko Chart
Free Online Marimekko Chart Maker
What is a Marimekko Chart?
A Marimekko chart (also called a Mekko or mosaic chart) is a two-dimensional stacked chart where column widths represent the total size of a category — such as market size or total revenue — while the stacked segments within each column show the proportional breakdown inside that category. This dual encoding lets you compare both the relative scale of groups and their internal composition in one view. Use it when market share, budget allocation, or segment distribution varies meaningfully across categories of different sizes.
Key Features
Variable-width columns
Column widths scale automatically to reflect each category's total value, making size differences immediately visible across the chart.
Stacked segment breakdown
Each column is divided into colored segments showing how sub-groups contribute to the total, with optional percentage and label overlays.
Customizable gap and border radius
Adjust spacing between columns and corner rounding to match your brand or improve readability in dense data sets.
Flexible legend placement
Position the segment legend at the top, bottom, left, or right to suit different layout needs without cluttering the chart area.
AI-generated from plain text
Describe your market data or paste raw numbers and the AI maps it directly to a Marimekko chart with correct widths, segments, and labels.
Best For
Market share analysis across segments of different sizes
Revenue breakdown by product line and customer type
Budget allocation across departments with varying totals
Competitive landscape comparisons by region or category
Consumer spending distribution by income group
Portfolio mix analysis showing weight and composition together
When to Use
- When category totals differ significantly and size context matters alongside the internal split
- When you need to show both market size and market share in a single chart instead of two separate visuals
- When comparing segment proportions across groups that have unequal totals would be misleading in a standard stacked bar chart
- When your audience needs to identify which categories dominate both in volume and in a specific sub-segment
- When presenting strategic data — such as revenue mix or spend allocation — to executives who need the full picture at a glance
Common Mistakes
- Using too many segments per column — more than five or six segments makes labels overlap and the chart unreadable
- Ignoring column width meaning — treating a Marimekko like a regular stacked bar and not explaining that width represents total size
- Inconsistent segment ordering across columns — keeping segments in the same vertical order across all columns aids comparison
- Choosing colors that are too similar — adjacent segments need sufficient contrast since they share both horizontal and vertical borders
- Omitting column total labels — without totals shown, readers cannot interpret what the width actually represents
- Cramming too many categories — more than eight columns compress widths to the point where labels and segments become illegible
Templates
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