What does this tool do?
The Statistics Calculator produces all the core descriptive statistics from a list of numbers at once: mean, median, mode, standard deviation, quartiles and more. It is built for students, teachers and anyone who needs a quick summary of a dataset.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
What it calculates
The tool computes thirteen metrics: count (N), sum, arithmetic mean, median, mode, minimum, maximum, range (max minus min), variance, standard deviation, first quartile (Q1), third quartile (Q3) and the interquartile range (IQR). You can separate numbers with commas, spaces or semicolons, and decimal and negative values are supported. Results update instantly as you type.
A note on variance
This calculator uses population variance and standard deviation, meaning the sum of squared differences is divided by N rather than N-1. That is correct when you have the entire dataset in hand. If you are working with a sample drawn from a larger population, the sample standard deviation (N-1) will be slightly larger, so keep this distinction in mind when interpreting the results.
Frequently asked questions
How should I separate the numbers?
You can use commas, spaces or semicolons; all three work the same way. '4, 8, 15' and '4 8 15' give identical results, and any non-numeric input is quietly ignored.
Why does Mode sometimes show 'None'?
If every value appears exactly once, meaning no number repeats more often than the others, there is no mode and 'None' is shown. When several values share the highest frequency, they are all listed, separated by commas.
How are Q1 and Q3 determined?
The numbers are sorted, and Q1 is the value at the one-quarter position of the list while Q3 sits at the three-quarter position. The IQR is the difference between Q3 and Q1, showing the spread of the middle half of your data.
Is Statistics Calculator free?
Yes. Statistics Calculator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Statistics Calculator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.