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LOG10 Function Examples in Excel, VBA, & Google Sheets

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This Tutorial demonstrates how to use the Excel LOG10 Function in Excel to calculate the base-10 logarithm of a number.

LOG10 Main Function


LOG10 Function Overview

The LOG10 Function Calculates the base-10 logarithm of a number.

To use the LOG10 Excel Worksheet Function, select a cell and type:

log10 formula syntax

(Notice how the formula inputs appear)

LOG10 Function Syntax and Inputs:


number – A number.

LOG10 Function 

The LOG10 Function returns the logarithm of a number to base 10.


LOG10 01


LOG10 Function – Decimal 

The LOG10 Function can also return the logarithm of a decimal number to base 10.


LOG10 02


LOG10 Function – Negative Number/Zero

The LOG10 Function will return an error if the argument is zero or a negative number. 


LOG10 03 01


LOG10 03 02

LOG10 Function – Power of 10

The LOG10 Function will return the exponent if the argument is expressed as a power of 10.


LOG10 04


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LOG10 in Google Sheets

The LOG10 Function works exactly the same in Google Sheets as in Excel:

LOG10 Gsheet

Additional Notes

Use the LOG10 Function to calculate the logarithm of a number to base-10. Simply enter any number directly into the formula, or reference a cell containing a number.

LOG10 Examples in VBA

You can also use the LOG10 function in VBA. Type:


Executing the following VBA statements

Range("B2") = Application.WorksheetFunction.Log10(Range("A2"))
Range("B3") = Application.WorksheetFunction.Log10(Range("A3"))
Range("B4") = Application.WorksheetFunction.Log10(Range("A4"))
Range("B5") = Application.WorksheetFunction.Log10(Range("A5"))
Range("B6") = Application.WorksheetFunction.Log10(Range("A6"))
Range("B7") = Application.WorksheetFunction.Log10(Range("A7"))
Range("B8") = Application.WorksheetFunction.Log10(Range("A8"))
Range("B9") = Application.WorksheetFunction.Log10(Range("A9"))

will produce the following results

Vba log10 function

For the function arguments (number, etc.), you can either enter them directly into the function, or define variables to use instead.

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