Histogram Generator

Paste your data and instantly generate a customizable histogram — download as PNG for your reports and assignments.

Data & Options

Data Values

Number of Bins Leave blank for auto (Sturges' rule)

Bar Color

Chart Title

X-Axis Label

Y-Axis Label

Display Option

Frequency Relative Frequency (%)

Load example:

Frequency Table

Bin Range	Frequency	Rel. Freq	Cumul. Freq

About Histograms

What is a Histogram?

A histogram displays the distribution of continuous data by grouping values into intervals (bins) and drawing bars whose heights represent the frequency in each bin. Unlike bar charts, histogram bars touch each other — indicating continuous data.

Choosing the Number of Bins

Sturges' Rule: k = 1 + 3.322 × log₁₀(n) — a common starting point for small datasets. Too few bins hide the shape; too many create noise.

Reading a Histogram

Symmetric (bell-shaped): mean ≈ median ≈ mode
Right-skewed: tail extends to the right; mean > median
Left-skewed: tail extends to the left; mean < median
Bimodal: two peaks — may indicate two subgroups

Curriculum Notes

FBISE / CBSE: Histograms in Class 9 and 11 Statistics
IGCSE / O Levels: Frequency density histograms (area = frequency)
A Levels / IB: Used with normal distribution and grouped data analysis

Enter data and click Generate Histogram

Tips

• Separate values with commas, spaces, or new lines.
• Leave bins blank to let Sturges' rule choose automatically.
• Use Relative Frequency (%) to compare datasets of different sizes.