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Logarithm Calculator
Enter a value and base to calculate the logarithm using the change-of-base formula.
How to use this tool
- 1Enter the value.
- 2Enter the base.
- 3See the calculated logarithm.
Frequently asked questions
What is the change-of-base formula?+
log_b(x) = ln(x) ÷ ln(b) — it lets you compute a logarithm in any base using only natural log (or any other single log function).
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