How to use Logarithm Calculator: Solve log_b(x) for Any Base
- Enter the base. Type the base 'b' of your logarithm — common picks are 2, 10, or e for natural log. Any positive number (except 1) works.
- Enter the value. Type 'x', the number you're taking the log of. It has to be positive — logs of zero or negatives will throw an error.
- Hit Calculate. Click the button and the tool computes log_b(x) instantly using the change-of-base formula behind the scenes.
- Check the result. Read off the decimal answer. The tool also shows the equivalent exponential form so you can double-check it makes sense.
- Review the steps. Skim the worked-out steps to see how the answer was reached — super useful when your homework asks you to show your work.
- Try another. Reset the form and run as many calculations as you need. No daily limits, no paywall.