Mean Median Mode Calculator

Paste numbers separated by commas, spaces, or new lines. Click any i for detail.

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Data

Numbers
i
List

Separate with commas, spaces, or line breaks.

How to use this calculator

  1. Paste or type the list.
  2. Read mean (headline), median, mode, and sample SD.
  3. A single z vs a known mean/SD is the z-score page.
  4. Empty tokens are ignored.

Results explained

Mean = sum / n. Median = middle of the sorted list (average of two middles if n is even). Mode = most frequent value, or none if all unique. Sample SD uses n − 1.

Quick reference: averages

Mean is pulled by outliers; median is not.

ItemDetail
MeanArithmetic average
Median50th percentile of the list
ModeMost frequent
z of one xZ-score calculator

Population SD (÷ n) is not shown — this is the sample version.

How the estimate is built

mean = Σx / n. sample SD = √(Σ(x−mean)² / (n−1)).

Example scenario

12, 15, 15, 18, 22, 24, 24, 30 — mean 20, median 20, modes 15 and 24.

FAQ

Two modes?

We list every value tied for most frequent.

Weighted mean?

Not this page — repeat numbers or use a spreadsheet.

Dates or grades as letters?

Convert to numbers first.