This post will guide you how to use** Excel ****LOG10 function** with syntax and examples in Microsoft excel.

### Description

The Excel LOG10 function returns the base-10 logarithm of a given number.

The LOG10 function is a build-in function in Microsoft Excel and it is categorized as a Math and Trigonometry Function.

The LOG10 function is available in Excel 2016, Excel 2013, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000, Excel 2011 for Mac.

### Syntax

The syntax of the LOG10 function is as below:

=LOG10 (number)

Where the LOG10 function arguments are:

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

** Note:**

- If the number argument is negative or zero, the LOG10 function will return #NUM! Error.
- If the number argument is non-numeric, the LOG10 function will return #VALUE! Error.

### Excel LOG10 Function Examples

The below examples will show you how to use Excel LOG10 Function to calculate the base 10 logarithm of a given number.

**1#** to get the base 10 logarithm of 45, enter the following formula in Cell B1.

=LOG10(45)

**2#** to get the base 10 logarithm of 25, enter the following formula in Cell B2.

=LOG10(25)

** **

**3#** to get the base 10 logarithm of 10 ^6, enter the following formula in Cell B2.

=LOG10(10^6)

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