RADIANS Function in Excel: Degrees to Radians

⏱ 1 min readUpdated 28 September 2026

MathLevel: IntermediateAvailable in: Excel 2007+

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

RADIANS converts degrees, because SIN, COS and TAN in Excel expect radians.

Syntax

=RADIANS(angle)
Argument What it means
angle In degrees.

Examples

Example 1

=SIN(RADIANS(30))

Returns 0.5. =SIN(30) gives −0.988, a classic mistake.

DEGREES · PI

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