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Tool Factory

Numbers, Units & Calculators

Mean Calculator

Calculate the arithmetic mean of decimal numbers. Separate values with commas, spaces, semicolons, or new lines.

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You can run the tool again after any change.

Separate decimal numbers with commas, spaces, semicolons, or new lines.

Your result appears here

Calculate the arithmetic mean of decimal numbers. Separate values with commas, spaces, semicolons, or new lines.

This tool runs open-source code from CyberChef by GCHQ (Apache License 2.0). See open-source credits.

The arithmetic mean divides the sum by the number of observations. Each observation has equal weight.

The result contains the mean, without a spread measure.

  • Average test scores, response times, or daily readings that all carry equal weight.

Average five scores

Input: 72 85 90 64 89

Settings: Commas, spaces, semicolons, or new lines separate numbers.

Result: 80

The sum is 400 and the count is 5, so the mean is 400 / 5 = 80. The calculator also reports the count and sum.

Choose a delimiter and interpret NaN

  1. Paste the observations and select their Delimiter.
  2. Remove currency signs, units, and thousands separators.
  3. Check the result against the smallest and largest observations.
  • Unreadable entries can be skipped silently.
  • An empty parsed list returns NaN.
  • Use a weighted calculation when observations have different weights.