Statistics Calculator

Use this free statistics calculator to summarize a data set with count, sum, mean, median, mode, min, max, range, quartiles, IQR, variance, standard deviation, steps, copy, and history.

All tools

Formula steps Examples included Copy results Private history

Data values

Statistics summary9 values

Mean: 17.2222222222
Median: 18
Mode: 21
Range: 15
Sample SD: 5.1908038341
IQR: 9

Steps

Sort the data: 10, 12, 12, 15, 18, 21, 21, 21, 25.
Add all values for sum 155 and divide by 9.
Use the middle value for the median and most frequent value for the mode.
Subtract min 10 from max 25 for the range.

How to use the statistics calculator

Enter a list of numbers separated by commas, spaces, or line breaks.
Press Calculate statistics to see mean, median, modes, range, quartiles, and standard deviation.
Review the sorted values and formula steps.
Use examples, recent answers, or copy the summary while comparing data sets.

Common uses

Summarize a list of data values in one result card.

Find center, spread, quartiles, and standard deviation together.

Check homework, class data, survey responses, and measurement lists.

Copy descriptive statistics into notes or reports.

Examples

Data summary 10, 12, 12, 15, 18, 21, 21, 21, 25

Mean = 17.2222222222

No repeated values 4, 8, 15, 16, 23, 42

No mode

Exam scores 72, 84, 84, 90, 93

Median = 84

Frequently asked questions

Quick answers about formulas, inputs, examples, result copying, and private in-browser history.

What does the Statistics Calculator calculate?

It calculates count, sum, mean, median, mode, min, max, range, quartiles, IQR, variance, and standard deviation.

How is the mean calculated?

The mean is the sum of all values divided by the number of values.

How is the median calculated?

The data is sorted from smallest to largest. The median is the middle value, or the average of the two middle values when there is an even count.

Can a data set have no mode?

Yes. This calculator reports no mode when every value appears only once.

What is IQR?

IQR means interquartile range. It is Q3 minus Q1 and describes the spread of the middle half of the data.

Is my statistics history private?

Yes. Recent statistics answers stay only in the current browser tab while you use the page. They are not sent to a server.