When frequency histograms help
A frequency histogram is useful when the actual count in each interval matters. Exam score bands, order value ranges, lab measurements, response times, and patient ages are all common examples.
Histogram guide
How to Make a Frequency Histogram
Use this guide when you need to see how often numeric values fall into each interval. The workflow fits pasted data, CSV exports, classroom assignments, lab summaries, and business reports.
The main histogram tool includes count, relative frequency, density, cumulative count, and cumulative percentage views, plus CSV export for the full frequency table.
Export the table behind the chart
After choosing a binning method, download the CSV frequency table to review the exact bin starts, ends, counts, relative frequencies, density values, and cumulative totals.
FAQ
What is a frequency histogram?
A frequency histogram groups numeric data into intervals called bins and displays the count of values in each interval as a bar. The height of each bar shows how often values fall within that range. Use a frequency histogram when the raw count per interval is the main quantity you want to communicate.
Can I export the frequency table?
Yes. After building the histogram, download a CSV frequency table that includes each bin's start and end, count, relative frequency, density, cumulative count, and cumulative percentage. This is useful for supplementary material or for reviewing the exact bin values behind the chart.
Can I use relative frequency instead of count?
Yes. The Y-axis selector offers five options: count, relative frequency, density, cumulative count, and cumulative percentage. Switching the view does not change the binning — only the scale used to display each bar's height.
Make a histogram from your data
Paste numbers, upload a CSV or TXT file, choose bins, customize labels and styles, then export SVG, PDF, PNG, CSV, or JSON from the main tool.
Go to the histogram maker