Spider Chart vs Radar Chart:
What’s the Difference?

Why Does This Cause Confusion?

The confusion arises because this chart type has accumulated an unusual number of names over the decades. Each name comes from a different visual metaphor people apply to the same structure. The spokes of the chart resemble a radar screen, a spider’s web, a star, or a wheel depending on who you ask — so multiple names stuck in different industries and regions.

In academic research, “kiviat diagram” is common (named after B.H. Kiviat). In geography fieldwork and education, “radar chart” dominates. In business and sports analytics, “spider chart” is widespread. In data visualization software, you’ll see all of these terms used interchangeably within the same documentation.

The practical takeaway: if someone asks you to make a spider chart, a radar chart, or a web chart, they want the same visualization. No need to clarify which one you’re building.

All the Names for the Same Chart

Here’s a reference table of the names you might encounter, along with the context where each term is most common:

Name	Also called	Most common context
Radar chart	—	General, education, geography
Spider chart	Spider graph, spider web chart	Business, sports analytics, HR
Web chart	—	Marketing, presentations
Star plot	Star chart, star diagram	Statistics, academic research
Kiviat diagram	Kiviat chart	Software engineering, academic
Polar chart	—	Sometimes used loosely (technically distinct)

Note that “polar chart” is sometimes used as a synonym, but this is technically imprecise. A polar chart uses compass-direction angles (0–360°) and is typically used in geography and physics to show directional distributions. A radar chart uses equally-spaced labeled axes without directional meaning. In practice, most people won’t notice the distinction, but it’s worth knowing if you’re working in a scientific context where terminology matters.

What Makes This Chart Type Unique

Whatever name you use, the defining characteristic of a radar/spider chart is its radial structure: multiple axes that share a common origin, with one variable per axis and values increasing outward from center. The connected data points form a polygon whose shape encodes the profile of the data — a balanced, wide polygon suggests consistent performance across dimensions, while a narrow or skewed polygon reveals concentration in certain areas.

This shape-encoding is what distinguishes radar charts from other multi-variable visualizations. A parallel coordinates chart, for example, uses parallel vertical axes and shows each data point as a connected line — excellent for spotting correlations but less intuitive for profile comparison. A heatmap excels at showing patterns across many variables but loses the sense of overall “shape” that a radar chart conveys.

Is There Ever a Real Difference?

In standard usage across business, education, and data visualization tools, radar chart and spider chart refer to the same thing with no distinction. However, you may occasionally encounter authors who draw a technical line between them:

• Some argue that a radar chart always uses a circular grid (concentric circles) while a spider chart uses a polygonal grid (concentric polygons). This distinction, while logical, is not standardized and most software tools ignore it.
• Some use “radar chart” specifically for charts with numeric data and “spider chart” for charts that compare qualitative ratings or rubric scores. Again, this is an informal distinction rather than a recognized standard.
• A small number of specialized tools define radar charts as single-series and spider charts as multi-series. This is rare and not a convention you need to follow.

For all practical purposes — building presentations, writing reports, requesting designs, or using charting software — treat both terms as identical and choose whichever sounds more natural to your audience.

When to Use a Radar/Spider Chart vs. Other Chart Types

Radar chart vs. bar chart

A bar chart is better when your audience needs to read exact values or compare one specific variable across many items. A radar chart is better when the combination of variables matters — when you want to communicate a profile, not just isolated numbers. If the story is “Team A scored higher on creativity” use a bar chart. If the story is “Team A has a more balanced overall profile than Team B,” use a radar chart.

Radar chart vs. scatter plot

A scatter plot shows the relationship between two continuous variables across multiple data points. It’s the right choice for correlation analysis. A radar chart shows how one entity (or a few entities) scores across multiple categorical dimensions. These are fundamentally different questions — if you’re asking “do these two variables move together,” use a scatter plot. If you’re asking “how does this entity compare across these categories,” use a radar chart.

Radar chart vs. heat map

Heat maps work better than radar charts when you have many variables (more than eight or nine) or many data points to compare simultaneously. A heat map grid of 20 variables × 15 entities is readable; a radar chart with 20 axes is not. For smaller multivariable comparisons, radar charts tend to be more immediately intuitive for a general audience.

Summary

If you’re ready to build one, the free online tool on this site lets you enter your data and generate a publication-ready radar chart in under a minute. No account, no software — open the builder on the homepage and start plotting.