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Statistics calculator

Get mean, median, mode, spread and quartiles from a list.

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Statistics calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Spaces separate values; 1,000 is one value.

Answer

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Mean is the sum divided by count. Median is the middle sorted value, averaging the middle pair. Population variance divides squared deviations by n; sample variance divides by n − 1.

More results
Precision and calculation record
Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.
Saved scenario
Save the current answer, then change an input to compare. This clears when you leave.
Formula and assumptions
Enter up to 1000 numbers. Quartiles use linear interpolation at index (n − 1) × percentile. Mode lists all tied most-frequent values; a list with no repeats has no repeated mode. Different quartile conventions can give different answers.
In a list, use spaces, new lines, semicolons, or commas followed by a space. A comma between groups of three digits is a thousands separator.
Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.
Scratch calculator
Use +, −, ×, ÷, parentheses and %. A percentage is divided by 100. This does not change the main tool.
Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.
Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.
Keyboard shortcuts
Updated 
Using Statistics calculator
Mean is the sum divided by count. Median is the middle sorted value, averaging the middle pair. Population variance divides squared deviations by n; sample variance divides by n − 1.
Enter up to 1000 numbers. Quartiles use linear interpolation at index (n − 1) × percentile. Mode lists all tied most-frequent values; a list with no repeats has no repeated mode. Different quartile conventions can give different answers.
Next: Expected value calculator
A worked example
With numbers = 2 4 4 4 5 5 7 9, the mean is 5.
Next: Weighted average calculator
Before you use the result
Enter up to 1000 numbers. Quartiles use linear interpolation at index (n − 1) × percentile. Mode lists all tied most-frequent values; a list with no repeats has no repeated mode. Different quartile conventions can give different answers.
Cite this page
ToolOctopus. “Statistics calculator.” Updated 2026-09-26. https://tooloctopus.com/statistics-calculator.
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