LOG10 function

This article describes the formula syntax and usage of the LOG10function in Microsoft Excel.


Returns the base-10 logarithm of a number.



The LOG10 function syntax has the following arguments:

  • Number    Required. The positive real number for which you want the base-10 logarithm.


The example may be easier to understand if you copy it to a blank worksheet.

How do I copy an example?

  1. Select the example in this article.

    Important   Do not select the row or column headers.

    selecting an example from help

    Selecting an example from Help

  2. Press CTRL+C.

  3. In Excel, create a blank workbook or worksheet.

  4. In the worksheet, select cell A1, and press CTRL+V.

    Important   For the example to work properly, you must paste it into cell A1 of the worksheet.

  5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

After you copy the example to a blank worksheet, you can adapt it to suit your needs.









Description (Result)


Base-10 logarithm of 86 (1.934498451)


Base-10 logarithm of 10 (1)


Base-10 logarithm of 1E5 (5)


Base-10 logarithm of 10^5 (5)

Applies To: Excel 2010, Excel Starter, Excel Online, SharePoint Online

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