How does the Histogram Calculator work?

Choose number of bins (Sturges: 1+log₂n) Then: Bin width = (max−min)/bins Then: Count values in each bin Then: Bar height = frequency (or relative frequency).

Can you give an example of how to use the Histogram Calculator?

Example: Input 20 test scores, 5 bins gives a result of Each bin spans 10 points; reveals normal-like distribution.

Is the Histogram Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Histogram Calculator?

Our Histogram Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Toán học

Histogram Calculator

Data (space/comma separated)

Number of Bins

✓Histogram (17 values, 5 bins)

[2.00, 5.80) — 4

[5.80, 9.60) — 4

[9.60, 13.40) — 3

[13.40, 17.20) — 3

[17.20, 21.00) — 3

A histogram displays the frequency distribution of a dataset by dividing the range into equal-width bins and counting how many values fall in each bin. It reveals the shape, spread, and central tendency of data.

Symbol	Name	Unit	Description
Bin width	size of each interval	—	—
Frequency	count of data points in bin	—	—
Density	normalized frequency (probability per unit width)	—	—

n (data points)	Suggested bins	Method
5–10	3–5	Square root
11–50	5–8	Square root
51–200	7–12	Sturges
201–1000	10–17	Sturges
1000+	15–20+	Rice rule

References

›Histogram — Khan Academy

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Histogram Calculator