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Average calculator: mean, median and mode

Paste or type a list of numbers to get the mean, median, mode, range, sum and standard deviation at once.

Mean (average)
—
Median
Mode
Range
Count
Sum
Minimum / Maximum
Standard deviation

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How to use the average calculator

Type or paste your numbers, separated by commas, spaces, semicolons or new lines – you can paste a column straight from a spreadsheet. All results update as you type.

Mean, median and mode

  • Mean (the usual “average”): add all numbers and divide by how many there are.
  • Median: the middle value when the numbers are sorted; with an even count, the mean of the two middle values.
  • Mode: the value that appears most often. A list can have several modes or none.

Mean = sum ÷ count

Worked examples

For 4, 8, 15, 16, 23, 42: the sum is 108, so the mean is 108 ÷ 6 = 18. Sorted, the middle values are 15 and 16, so the median is 15.5. No value repeats, so there is no mode. The range is 42 − 4 = 38.

For 2, 3, 3, 5, 7, 10: the mean is 5, the median 4 and the mode 3.

Standard deviation

The standard deviation shows how spread out the numbers are. The calculator shows the sample standard deviation (dividing by n − 1), which is what spreadsheets return with STDEV.S. For 4, 8, 15, 16, 23, 42 it is about 13.49; the population version (dividing by n) is 12.32.

When the data has outliers – like one very high salary – the median is often a better “typical value” than the mean. For averages where some values count more than others, use the weighted average (GPA) calculator.

Frequently asked questions

What is the difference between mean and median?
The mean adds everything and divides by the count; the median is the middle value. Extreme values pull the mean but barely move the median.
Can there be more than one mode?
Yes. If two or more values appear equally often (and more than once), they are all modes. If every value appears once, there is no mode.
Which standard deviation does the calculator use?
The sample standard deviation (n − 1), the same as STDEV.S in Excel and Google Sheets.

Last reviewed: November 13, 2026

Results are estimates for general information only and are not financial, tax, medical or legal advice. Check important figures with a qualified professional.