Statistics Calculator
Paste a list of numbers and get count, sum, mean, median, mode, range, variance, standard deviation and quartiles. no signup required, no upload required.
- Free, no sign-up
- REST + MCP
- Updated
- Reviewed by Olgun Ozoktas
8 values
Commas, spaces, semicolons and new lines all separate — paste a spreadsheet column straight in.
Sample if your numbers are a subset of a bigger group, population if they are the whole group.
Results
- Mean
- 5
- Median
- 4.5
- Standard deviation
- 2.1380899353
- Count
- 8
- Range
- 7
- Sum
- 40
- Variance
- 4.57142857143
- Mean
- 5
- Standard deviation
- 2.1380899353
- Median
- 4.5
- Q1 (25th percentile)
- 4
- Mode
- 4
- Q3 (75th percentile)
- 5.5
- Minimum
- 2
- Interquartile range
- 1.5
- Maximum
- 9
Why use this statistics calculator?
Most summary statistics questions start with a column of numbers already on the clipboard. Paste it here in whatever shape it arrived in — commas, spaces, semicolons or one per line — and every descriptive statistic appears at once, including the quartiles that spreadsheets make you write a formula for. Everything runs in your browser.
Frequently Asked Questions
What is the difference between sample and population standard deviation?
Sample standard deviation divides by n-1 and is the right choice when your numbers are a sample drawn from a larger group — it corrects for the fact that a sample underestimates the spread of the whole. Population divides by n and is correct only when you have measured every member of the group. Sample is the default here, and it is what most statistics courses and spreadsheet STDEV functions use.
How do you calculate the quartiles?
By linear interpolation between the closest ranks, which is the same method spreadsheets use for PERCENTILE and QUARTILE. For nine values 1 to 9 that gives Q1 = 3 and Q3 = 7.
What happens if no number repeats?
Every value is tied for the most frequent, so the mode is the whole list. That is the honest answer rather than showing nothing.
Can it handle a column pasted from Excel or Google Sheets?
Yes. Newlines, tabs, spaces, commas and semicolons all separate values, and blank entries are ignored, so a pasted column works without cleaning it up first.
How many numbers can I paste?
Up to 100,000 values. Beyond that the tool stops rather than freezing the page.
Do I need an account?
No. This tool requires no signup, no usage limits, and no watermarks.