Histogram vs Bar Chart
They look alike but do different jobs
Histograms and bar charts both use bars, which is why people mix them up. The difference is what the bars stand for. A histogram shows one set of numbers grouped into ranges. A bar chart compares separate categories.
Side by side
| Histogram | Bar chart | |
|---|---|---|
| Data type | Numeric, grouped into bins | Categories or groups |
| Bars | Touch, no gaps | Separated by gaps |
| Bar order | Fixed by the number line | Can be reordered freely |
| X axis | A continuous scale | Category labels |
| Answers | How is this variable distributed | How do these groups compare |
How to pick
Ask what your x-axis is. If it is a number you could measure on a ruler or a clock, like age, height, price, or time, and you want to see how it is spread, use a histogram. If it is a set of names, like product, city, or team, and you want to compare them, use a bar chart.
A quick tell: histogram bars touch because the ranges are continuous, while bar chart bars have gaps because the categories are separate. Build a histogram of your numbers with the histogram maker, or read what is a histogram for the basics.
Frequently asked questions
- What is the main difference between a histogram and a bar chart?
- A histogram shows numeric data grouped into ranges (bins) with bars that touch. A bar chart compares separate categories with gaps between the bars.
- Why do histogram bars have no gaps?
- Because the bins are continuous ranges that meet end to end on the number line. Gaps would suggest missing values between the ranges, which is not the case.
- Can I reorder the bars in a histogram?
- No. Histogram bars follow the number line, so their order is fixed. Bar chart bars represent independent categories and can be sorted any way you like.