Histogram Maker
Paste a list of numbers to build a histogram. The values are automatically grouped into bins and the chart shows how many fall into each range, revealing the shape of the distribution.
How it works
A histogram groups a set of numbers into equal-width ranges, called bins, and draws a bar for each bin whose height is the count of values that fall inside it. It shows the shape of a distribution — whether the data are symmetric, skewed, clustered or spread out — in a way a raw list cannot. Paste your numbers, one per line or separated by commas or spaces; the tool chooses a sensible number of bins automatically based on how many values you have.
Every value is placed in exactly one bin, with the maximum value included in the final bin, and the chart re-colours for light and dark themes. Paste as many numbers as you like and screenshot the result for a report.
Examples
- A tall central bar with shorter bars either side indicates a roughly normal distribution.
- Bars bunched to one side indicate a skewed distribution.
- The number of bins is chosen automatically from the sample size.
Frequently asked questions
- What input does a histogram need?
- A single list of numbers, one per line or separated by commas, tabs or spaces. Labels are not needed — the tool bins the raw values.
- How many bins are used?
- The number of bins defaults to about the square root of the sample size, clamped between 5 and 20, which works well for most data sets.
- What does the histogram tell me?
- It reveals the distribution's shape — its centre, spread, skewness and any peaks — which summary statistics alone can hide.
- Is my data private?
- Yes. The histogram is computed entirely in your browser and your data never leaves your device.