Log Calculator
Calculate the logarithm of a number to any base, along with its natural log (ln) and log base 10.
Show solution steps
What is the Log Calculator?
A logarithm answers the question "what power must the base be raised to, to get this number?" Logs are fundamental in maths, science and finance.
How to Calculate
Any base is computed via logₐ(x) = ln(x) ÷ ln(a).
Formula
logₐ(x) = ln(x) ÷ ln(a)
How to Use
- Enter your details in the fields above.
- The result updates instantly as you type.
- Use Copy, Print or Download PDF to save your result.
Frequently Asked Questions
What is a natural log?
The natural log (ln) is a logarithm to base e (u22482.718). It appears throughout calculus, growth and decay problems, and compound-interest maths.
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