Syntax

TRIMMEAN(data, exclude_proportion)

Arguments

The printed syntax lists 2 argument(s), in order:

  • data
  • exclude_proportion

“optional” marks an argument Google prints in square brackets; “repeatable” marks one Google prints with “…”.

Description from Google Docs Editors Help

“Calculates the mean of a dataset excluding some proportion of data from the high and low ends of the dataset.”

Google’s help article for TRIMMEAN →

Source: Google Docs Editors Help, “Google Sheets function list” (support.google.com/docs/table/25273), record record 408 of 516, data fetched 28 September 2026. Data month: September 2026.