Sign in with Microsoft
Sign in or create an account.
Hello,
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.

Returns the logarithm of a number to the base you specify.

Syntax

LOG(number,base)

Number     is the positive real number for which you want the logarithm.

Base     is the base of the logarithm. If base is omitted, it is assumed to be 10.

Examples

Formula

Description (Result)

=LOG(10)

Logarithm of 10 (1)

=LOG(8, 2)

Logarithm of 8 with base 2 (3)

=LOG(86, 2.7182818)

Logarithm of 86 with base e (4.454347)

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!

×