Syntax

GAMMA.INV(probability, alpha, beta)

Arguments

The printed syntax lists 3 argument(s), in order:

  • probability
  • alpha
  • beta

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

Description from Google Docs Editors Help

“The GAMMA.INV function returns the value of the inverse gamma cumulative distribution function for the specified probability and alpha and beta parameters.”

Google’s help article for GAMMA.INV →

Source: Google Docs Editors Help, “Google Sheets function list” (support.google.com/docs/table/25273), record record 332 of 516, data fetched 28 September 2026. Data month: September 2026.