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MS Excel: Ln Function


In Excel, the Ln function returns the natural logarithm of a number.

The syntax for the Ln function is:

Ln( number )

number is a numeric value that must be greater than 0.

Applies To:

  • Excel 2007, Excel 2003, Excel XP, Excel 2000

For Example:

Let's take a look at an example:

Based on the Excel spreadsheet above:

=Ln(A1) would return 2.995732274
=Ln(A2) would return 3.218875825
=Ln(A3) would return 4.605170186
=Ln(200) would return 5.298317367