Compressed y-Axis
Definition
A shortened y-axis can visually exaggerate differences in a chart.
A chart axis whose visible value range does not start at the natural zero point and can thereby visually enlarge differences.
Simply explained
The chart shows only a small excerpt of the values. This makes small differences between bars or points appear particularly large.
Why it matters in practice
The term helps to make digital offerings understandable, accessible, and aligned with users' needs.
Example from business
A report shows absolute values from zero and adds a clearly marked second view for narrow excerpts.
Limits and pitfalls
- Not every shortened axis is wrong; axis breaks, range, units, and relative effect must be clearly visible.
Origin & history
The issue has been known since statistical graphics and data visualization as a potentially misleading representation.
Use in mid-sized companies
- Possible application: A report shows absolute values from zero and adds a clearly marked second view for narrow excerpts.
Frequently asked questions
What does Compressed y-Axis mean?
A chart axis whose visible value range does not start at the natural zero point and can thereby visually enlarge differences. What should be considered? Not every shortened axis is wrong; axis breaks, range, units, and relative effect must be clearly visible.
Sources
- Data visualisation guidance · UK Government Analysis Function, Data visualisation guidance
Source checked on 10.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: