Bar Graph vs Line Graph: What's the Difference?
Bar graphs display data using rectangular bars. The length or height of each bar represents the value.
Ideal for comparing categorical data across different groups.
Line graphs connect data points with a continuous line. They show how values change over time or across a sequence.
Perfect for displaying trends and patterns in continuous data.
Simple rule: Use a bar graph to compare categories. Use a line graph to show change over time.
When to Use a Bar Graph
Bar graphs work best when you want to compare values across different categories. Here are the most common use cases:
Bar Graph Example
Use a bar graph when you have categorical data like:
| Website | Monthly Visits (Millions) |
|---|---|
| 89600 | |
| YouTube | 34600 |
| 24800 | |
| 18700 | |
| X (Twitter) | 9200 |
| Wikipedia | 7600 |
| 6400 | |
| Amazon | 6150 |
| TikTok | 5980 |
| Netflix | 4820 |
When to Use a Line Graph
Line graphs are best for showing changes over time or data that has a continuous relationship. Common use cases include:
Line Graph Example
Use a line graph for time-series data like:
| Month | Average Temperature (°C) |
|---|---|
| Jan | 18.2 |
| Feb | 20.1 |
| Mar | 23.8 |
| Apr | 27.6 |
| May | 31.4 |
| Jun | 34.2 |
| Jul | 35.1 |
| Aug | 34.6 |
| Sep | 31.0 |
| Oct | 26.3 |
| Nov | 21.7 |
| Dec | 17.9 |
Bar Graph vs Line Graph Examples
Here's when to use each type with the same data:
Best for category comparisons
- Comparing Q1 vs Q2 vs Q3 vs Q4 revenue
- Showing which product sells most
- Displaying survey results
Best for trend analysis
- Revenue growth over 12 months
- Website traffic trend over time
- Temperature changes across days
Can You Combine Both?
You can combine bar and line graphs in a single chart when you want to show:
- Two data types with different scales (e.g., revenue and profit margin)
- Categorical comparison + trend in one view
- Actual values vs target or goal
This is called a combo chart or dual-axis chart. It's useful when you need to show both categories and trends together.
Learn more about combo charts →