RADIANS Function in Excel: Degrees to Radians

RADIANS Function in Excel: Degrees to Radians featured illustration

📎 This article includes 1 downloadable practice file ↓

⏱ 2 min read

MathLevel: IntermediateAvailable in: Excel 2007+

In this article
  1. Syntax
  2. Examples
  3. Example 1
  4. RADIANS in practice
  5. Where you will use it
  6. Worked example
  7. Mistakes people make
  8. Related functions
  9. Continue learning

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

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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.

RADIANS in practice

Where you will use it

  • Prepare angles for SIN/COS/TAN
  • Distance formulas
  • Engineering calcs

Worked example

DegreesFormulaResult
180=ROUND(RADIANS(A2),4)3.1416
90=ROUND(RADIANS(A3),4)1.5708
45=ROUND(RADIANS(A4),4)0.7854

Results calculated in Excel.

Mistakes people make

MistakeWhat to do instead
Feeding degrees to SINAlways wrap in RADIANS
PrecisionRound for display

DEGREES · PI

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📎 Practice files for this article

  • 📗
    Practice workbook: Math & rounding24 tasks on realistic sales data — type your formula, the Check column turns green when it is right. Answers sheet included.
    ⬇ XLSX · 35 KB

Free to use for learning. Files with macros (.bas) are plain text — import them with Alt+F11 → File → Import File, and always test on a copy.

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