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Average Calculator

Calculate the arithmetic mean and show the sum, count, minimum and maximum for a simple list of signed numbers.

🔒 Private • Browser processing — working inputs stay in this tab.

CalculatorsLast reviewed: September 26, 2026

What this average calculator returns

The tool extracts signed integers and decimals from the text field. It adds the values, divides the sum by the number of values and displays the arithmetic mean. The same result card also shows sum, count, minimum and maximum so that you can spot a missing entry or an unexpected extreme value.

Arithmetic mean formula

Arithmetic mean = sum of all entered values ÷ number of values. The count is based on the numeric patterns the runtime recognises, not on the number of commas. Negative signs and decimal points are supported; text that does not match a number is ignored.

How to review the result

Enter the complete dataset, compare the displayed count with the number you expected and then inspect the minimum and maximum. A correct formula can still produce a misleading business summary if an outlier, duplicate entry or omitted value changes the dataset. Return to the original records for consequential decisions.

When arithmetic mean is not enough

The tool does not calculate median, mode, weighted mean, variance or statistical significance. A weighted price, an uneven sample or a dataset with extreme values may need a different method. Use this page for a transparent simple mean, not a full statistical analysis.

Worked example

Practical example

For 10, 20, -5 and 15.5, the sum is 40.5 and the count is 4. The arithmetic mean is 40.5 ÷ 4 = 10.125, displayed as 10.13 by the result formatter; the minimum is -5 and the maximum is 20.

Limitations

Only the arithmetic mean is calculated.
Text containing recognisable numeric fragments can be extracted even if the surrounding text was accidental.
Formatting rounds displayed values to at most two decimal places.
A mean can conceal outliers, distribution and business context.

Privacy and file processing

The number list is parsed and calculated in the browser tab. Do not paste confidential datasets without reviewing the site's Tool Privacy & File Processing Policy. Read the full policy.

FAQs

Can I enter negative numbers and decimals?

Yes. The runtime recognises signed integers and decimal values such as -5 and 15.5.

What separators can I use?

Comma- or space-separated lists work, and the runtime extracts recognised number patterns from the field. Always compare the displayed count with your expected dataset size.

Does this calculate median or weighted average?

No. It calculates only arithmetic mean plus sum, count, minimum and maximum.

Why can the displayed average have fewer decimal places?

The shared result formatter displays at most two decimal places, although the calculation uses the underlying numeric values.

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Reviewed by

Ashok Kumar Sachdeva

Ashok Kumar Sachdeva brings approximately 10 years of Amazon India seller experience across listing optimization, catalog operations, keyword planning, invoices, and everyday marketplace workflows.

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Last reviewed: September 26, 2026