Log Calculator
This free log calculator solves for the unknown portions of a logarithmic expression using base e, 2, 10, or any othe...

What Log Calculator does
A log calculator that solves for the unknown value in a logarithm equation when any two of the three variables—base, argument, or result—are provided. It supports base 10, base 2, the natural base e, and custom bases entered by the user. The result displays the computed logarithm value along with a step-by-step explanation of how the answer was derived. Beyond basic evaluation, the page includes reference sections on logarithm properties, such as the product rule, quotient rule, power rule, and base change formula, each worked with example calculations. A link to related scientific and exponent calculators is also provided for extended functionality.
How to use the Calculator.net Log Calculator
- 1
Open the Log Calculator page on Calculator.net
- 2
Enter the base value (e.g., 10, 2, e, or a custom number) in the designated field
- 3
Enter the argument (x) or the result (y) depending on which value is unknown
- 4
Click the Calculate button to obtain the logarithm value
- 5
Review the output and the automatically generated step-by-step explanation
Best for
Students, educators, and anyone needing to evaluate logarithmic expressions or solve for an unknown variable in log equations without manual computation.
Limitations
- Results are estimates based on standard calculator precision
- No option to switch between different output formats beyond the computed value
- The interface relies on JavaScript; results will not appear if scripts are disabled
Log Calculator FAQ
- Can I use this calculator to find the logarithm of a number with any base?
- Yes, the tool accepts base 10, base 2, the natural base e, or any custom base you enter manually.
- What does the step-by-step explanation show?
- It displays the logarithmic rules applied to reach the final result, such as the product, quotient, or power rule, with example calculations for each.
- Is there a difference between using 'log' and 'ln' in this calculator?
- The calculator explicitly supports 'e' as a base; when the base is e, the natural logarithm is computed, which is typically written as ln.
- Can I learn the basic rules of logarithms from this page?
- Yes, the page includes a 'Basic Log Rules' section that explains the product, quotient, power, and change-of-base rules with worked examples.
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