Histogram Maker: Make a Histogram From Data Free
This histogram maker turns a list of numbers into a clean histogram in seconds. Paste data separated by commas, spaces or new lines, such as test scores, heights in inches or delivery times, and the tool picks a sensible number of bins with Sturges’ rule. You can set your own number of bins, an exact bin width or a starting value, switch between frequency and relative frequency (percent), add a title and axis labels, and download the chart as a PNG for homework, reports or slides. A frequency table with every class interval, count, percent and cumulative percent is built underneath, along with the count, mean, median and range.
Histogram Maker
Paste numbers to draw a histogram with automatic or custom bins, a frequency table and a PNG download.
How to use the Histogram Maker
- Paste or type your numbers.
- Leave bins on Auto or set a bin count, bin width and start.
- Add a title and axis labels.
- Download the histogram as PNG or copy the frequency table.
Features
- Auto bins with Sturges’ rule
- Custom bin count, width and start
- Frequency or relative frequency
- Frequency table with cumulative percent
- Title and axis labels
- PNG download
Frequently asked questions
How do I choose the number of bins?
A common rule is Sturges’: bins = 1 + log2(n). For 50 values that is about 7 bins. Try a few counts and pick the one that shows the shape best.
What is the difference between a histogram and a bar chart?
A histogram shows how numeric data is distributed across touching intervals. A bar chart compares separate categories, with gaps between the bars.
Which bin does a value on the edge go into?
Each bin includes its left edge and excludes its right edge, so 70 goes in 70–80. The last bin also includes its right edge.
What is relative frequency?
The share of all values that fall in a bin, shown as a percent. It lets you compare data sets of different sizes.
How do I make a histogram in Excel or Google Sheets?
You can, but this tool is faster: paste the column of numbers here and download the chart as an image.