RSQ Function in Excel: How Well a Line Fits

⏱ 1 min readUpdated 28 September 2026

StatisticsLevel: ExpertAvailable in: Excel 2007+

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

RSQ returns R², between 0 and 1. Near 1 means a straight line explains the data well; near 0 means your trend forecast is mostly a guess.

Syntax

=RSQ(known_ys, known_xs)
Argument What it means
known_ys Values.

Examples

Example 1

=RSQ(C2:C25, A2:A25)

Check this before trusting a linear forecast.

CORREL · SLOPE

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