Exceljet

Quick, clean, and to the point

Excel LOG Function

Excel LOG function
Summary 

The Excel LOG function returns the logarithm of a given number, using a supplied base. The base argument defaults to 10 if not supplied.

Purpose 
Get the logarithm of a number
Return value 
The logarithm
Syntax 
=LOG (number, [base])
Arguments 
  • number - Number for which you want the logarithm.
  • base - [optional] Base of the logarithm. Defaults to 10.
Usage notes 

The LOG function allows you to get the logarithm of a number with a specified base.

Related functions 
Excel LOG10 function
Excel LOG10 Function
The Excel LOG10 function returns the base 10 logarithm of a number. For example, LOG10(100) returns 2, and LOG10(1000) returns 3.
Good links 
Microsoft LOG function documentation

Excel Formula Training

Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.

500 Formula Examples, thoughtfully explained.