Average & Statistics Calculator

Mean, median, mode, range and standard deviation of numbers. Free, no sign-up, works in your browser.

🔒 100% private — processing happens in your browser. Nothing is uploaded.

How to use the average calculator

  1. Paste or type numbers — separated by commas, spaces or one per line (you can paste a column from Excel).
  2. All results update instantly: mean, median, mode, range, quartiles, standard deviation and variance.
  3. A small histogram shows how the values are spread.

Use it for school grades, test scores, prices, sports stats or lab measurements. The sample standard deviation (n−1) is what most textbooks and Excel’s STDEV use; the population version (n) is for when you have every value, not a sample.

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