ISO.CEILING Function in Excel: Round Up, Ignoring the Sign

⏱ 1 min readUpdated 28 September 2026

MathLevel: ExpertAvailable in: Excel 2010+

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

ISO.CEILING always rounds towards positive infinity, whatever the sign of the multiple — useful when data mixes positive and negative adjustments.

Syntax

=ISO.CEILING(number, [significance])
Argument What it means
significance Default 1.

Examples

Example 1

=ISO.CEILING(-4.3)

Returns −4.

CEILING.MATH

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