Applies ToExcel for Microsoft 365 Excel for Microsoft 365 for Mac Excel for the web Excel 2024 Excel 2024 for Mac Excel 2021 Excel 2021 for Mac Excel 2019 Excel 2016

This article describes the formula syntax and usage of the LN function in Microsoft Excel.

Description

Returns the natural logarithm of a number. Natural logarithms are based on the constant e (2.71828182845904).

Syntax

LN(number)

The LN function syntax has the following arguments:

  • Number    Required. The positive real number for which you want the natural logarithm.

Remark

LN is the inverse of the EXP function.

Example

Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.

Formula

Description

Result

=LN(86)

Natural logarithm of 86

4.4543473

=LN(2.7182818)

Natural logarithm of the value of the constant e

1

=LN(EXP(3))

Natural logarithm of e raised to the power of 3

3

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.