Skip to main content

Excel LOG10 Function

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

log10 function 1


=LOG10 (number)


  • Number (required): The positive number that you want to calculate the base-10 logarithm of.

Return value

The LOG10 function returns a numeric value.

Function notes

  1. Number, the only argument in the LOG10 function, should be supplied as a numeric value.
  2. LOG10 function will return the #VALUE! error if number is non-numeric.
  3. LOG function will return the #NUM! error if number ≤ 0.
  4. In LOG function, when the base argument is omitted, it defaults to 10. In this situation, LOG10(number) is equal to LOG(number). For example,

    =LOG10 (100) equals to =LOG (100)


Supposing, you want to calculate the base-10 logarithms of the given numbers in the table below. Please do as follows.

1. Copy the formula below into cell C4.

=LOG10 (B4)

2. Then drag the fill handle down to the cells you want to apply this formula too. The results are as the following screenshot shows.

log10 function 2


We can directly input value in the number argument in the formula. For example, the formula in cell C4 can be changed to:

=LOG10 (0.1)

Relative Functions:

  • Excel EVEN Function
    The EVEN function rounds numbers away from zero to the nearest even integer.

  • Excel EXP Function
    The EXP function returns the result of the constant e raised to the nth power.

The Best Office Productivity Tools

Office Tab - Enable Tabbed Reading and Editing in Microsoft Office (include Excel)

  • One second to switch between dozens of open documents!
  • Reduce hundreds of mouse clicks for you every day, say goodbye to mouse hand.
  • Increases your productivity by 50% when viewing and editing multiple documents.
  • Brings Efficient Tabs to Office (include Excel), Just Like Chrome, Edge and Firefox.
Comments (0)
No ratings yet. Be the first to rate!
There are no comments posted here yet
Please leave your comments in English
Posting as Guest
Rate this post:
0   Characters
Suggested Locations