BESSELJ Function in Excel: Bessel Function Jn(x)

BESSELJ Function in Excel: Bessel Function Jn(x) 1
⏱ 1 min readUpdated 5 October 2026

EngineeringLevel: ExpertAvailable in: Excel 2007+

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

BESSELJ returns the Bessel function of the first kind, Jn(x): vibrating drums, FM radio spectra and wave problems.

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Syntax

=BESSELJ(x, n)
Argument What it means
x Value
n Order

Examples

Example 1

=ROUND(BESSELJ(A2,B2),5)

Result: 0.32993. See the worked example table below for more cases.

BESSELJ in practice

Where you will use it

  • FM modulation sidebands
  • Vibration modes
  • Physics coursework

Worked example

xnFormulaResult
1.92=ROUND(BESSELJ(A2,B2),5)0.32993
00=ROUND(BESSELJ(A3,B3),5)1
51=ROUND(BESSELJ(A4,B4),5)-0.32758

Results calculated in Excel.

Mistakes people make

MistakeWhat to do instead
Negative n#NUM!
PrecisionResults are accurate to about 1E-7

BESSELY · BESSELI

📚 Part of the free Excel course: Beginner → Expert · Try it in the Formula Lab or ask the AI Helper.

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