Math
Log Calculator
Compute a logarithm for a chosen base (default base 10).
Free to use — no sign-up or login.
Result
This free Log Calculator covers Compute a logarithm for a chosen base (default base 10).
A logarithm answers: to what power must the base be raised to get this value?. Related math tools sit beside How it works, with no account required.
Using the Log Calculator
Compute a logarithm for a chosen base (default base 10). Fill the labeled fields on the Log Calculator and read the result. The formula stays in How it works rather than being repeated here.
FAQ
How do I use the Log Calculator?
Enter the labeled values on the Log Calculator and read the output. Change-of-base formula.
What formula does the Log Calculator use?
The Log Calculator uses the identity in How it works. In words: Change-of-base formula.