ISLOGICAL Function in Excel: Is It TRUE or FALSE?

⏱ 1 min readUpdated 28 September 2026

InformationLevel: IntermediateAvailable in: Excel 2007+

In this article
  1. Syntax
  2. Examples
  3. Example 1
  4. Related functions

ISLOGICAL checks whether a value is a real TRUE/FALSE. Imports often bring the text “TRUE”, which looks identical but is not.

Syntax

=ISLOGICAL(value)
Argument What it means
value Anything.

Examples

Example 1

=ISLOGICAL(B2)

FALSE for the text “TRUE” from a CSV.

ISTEXT · ISNUMBER

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