About the Logarithm Calculator
A free tool for computing logarithms in any base.
What it is
This calculator finds log_b(x) for any positive base and value using the change-of-base formula, showing the working and a verification check that raising the base to the result reproduces the original value.
Features
Any base
Compute logarithms in base 2, 10, e, or any other positive base.
Common presets
One-click buttons for base 10 and base e.
Working shown
See the change-of-base formula applied and a result check.
Instant, private
Runs entirely in your browser. No data is sent anywhere.