This post will guide you how to use Excel LN function with syntax and examples in Microsoft excel.

1. Description

The Excel LN function returns the natural logarithm of a given number.  And the natural logarithms are based on the constant e (the value is equal to 2.718281828…).

The LN function is a build-in function in Microsoft Excel and it is categorized as a Math and Trigonometry Function.

The LN function is available in Excel 2016, Excel 2013, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000, Excel 2011 for Mac.

2. Syntax

The syntax of the LN function is as below:

= LN (number)

Where the LN function arguments is:

• number – This is a required argument. The number that you want the logarithm. And the number must be a positive real number.

 Note:

• If either the supplied number argument is negative or zero, the LN function will return #NUM! Error.
• If the number argument is non-numeric, the LN function will return #VALUE! Error.
• LN is the inverse of the Exp function.

3. Excel LN Function Examples

The below examples will show you how to use Excel LN Function to calculate the natural logarithm of a given number.

1# to get the natural logarithm of 14, enter the following formula in Cell B1.

= LN (14)

2# to get the natural logarithm of the value of the constant e (2.71828), enter the following formula in Cell B2.

= LN (2.71828)

3# to get the natural logarithm of e raised to the power 2, enter the following formula in Cell B2.

= LN (EXP(2))

4. Video: How to Use Excel LN Function

This Excel video tutorial, we’ll explore the LN function in Excel, which is used to calculate the natural logarithm of a number.

5. Related Functions

• Excel LOG10 function
  The Excel LOG10 function returns the base-10 logarithm of a given number.The syntax of the LOG10 function is as below:= LOG10 (number)…
• Excel LOG function
  The Excel LOG function returns the logarithm of a given number based on a supplied base. And the default base argument is 10.The syntax of the LOG function is as below:= LOG (number,[base])…