CORREL Function in Excel: How Strongly Two Things Move Together

⏱ 1 min readUpdated 28 September 2026

StatisticalLevel: ExpertAvailable in: Excel 2007+

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

CORREL returns a number between −1 and 1: near 1 means both rise together, near −1 means one falls as the other rises, near 0 means no linear link.

Syntax

=CORREL(array1, array2)
Argument What it means
array1, array2 Two ranges of equal size.

Examples

Example 1

=CORREL(B2:B25, C2:C25)

Ad spend vs sales across 24 months.

💡 Correlation is not causation: ice-cream sales and AC sales correlate because of summer, not because one causes the other.

RSQ · SLOPE · LINEST

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