Log Calculator
Calculates the logarithm of a number using a chosen base.
Lilu Baba's Log Calculator computes log base b of a value instantly, for common log (base 10), natural log (base e), or any custom base.
How to use this calculator
- Enter the value you want the logarithm of.
- Enter the base (e.g. 10 for common log, or 2.71828 for natural log).
- The result updates instantly.
Log Result
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FAQ
Log Calculator — frequently asked questions
Enter 2.71828 (Euler's number, e) as the base.
No — logarithms are only defined for positive values.