Choosing the Right Chart Type

Choosing the wrong chart type for a given piece of data is one of the most common—and most avoidable—mistakes when building a dashboard. The right chart makes a pattern obvious within seconds; the wrong one forces the viewer to work hard to extract meaning that should have been immediately visible.

Guidance by chart type

A pie chart is best suited to showing how a whole is divided into proportional parts—for example, the percentage breakdown of open support tickets by category (Billing, Technical, General). It works well with a modest number of categories but becomes hard to read once you're trying to represent more than five or six slices.

Bar charts excel at comparing discrete values across categories—for example, comparing total deal value closed by each sales rep this quarter. Unlike a pie chart, a bar chart handles a larger number of categories gracefully and makes it easy to spot which value is highest or lowest at a glance.

A line chart is the natural choice whenever you're tracking change over time—revenue trending across months, ticket volume trending across weeks, or attendance patterns trending across a quarter. If the question you're answering starts with "how has this changed," a line chart is almost always the right tool.

Timeline widgets are best for visualizing scheduled or sequential events across dates, without necessarily focusing on numeric comparison—useful for content calendars or upcoming milestone tracking on a dashboard.

A simple decision framework

Before choosing a chart type, it helps to finish this sentence out loud: "I want this widget to help someone quickly see ___." If the answer is "how something is split up," reach for Pie. If it's "how these compare," reach for Bar. If it's "how this has changed," reach for Line. If it's "what's coming up and when," reach for Timeline.

FAQ

Which chart type is best for showing a trend over time? 

A line chart is typically best for visualizing trends over time.

How many categories can a pie chart reasonably display? 

Pie charts generally become hard to read past five or six categories—a bar chart is often a better choice beyond that point.