Logarithm Calculator
Calculate a logarithm in a base you choose and compare it with the natural logarithm. The change-of-base formula is shown below.
- Free
- No sign-up
- Runs in your browser
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Result
Enter the required values to see your result. Use the example to try the complete calculation.
The value and base must be positive, and the base cannot be 1. A base between 0 and 1 is allowed. No symbolic simplification is performed.
How this calculation works
Logarithm Calculator
Calculate a logarithm in a base you choose and compare it with the natural logarithm. The change-of-base formula is shown below.
Units and limits
The value and base must be positive, and the base cannot be 1. A base between 0 and 1 is allowed. No symbolic simplification is performed.
Formulas
- Calculation
- log_b(x) = ln(x) / ln(b)
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Discover VISU LinkHow to use it
- Choose the operation when available and enter your own values in the labelled fields.
- Check the units and the limits explained below before interpreting the answer.
- Read the result and its details. Copy it or download a result card; no account is required.
Examples
Worked example
log₂(1024) = 10.
Another case
log₁₀(1000) = 3; the natural logarithm of 1000 is about 6.907755.
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Questions
What does this tool calculate?
Calculate a logarithm in a base you choose and compare it with the natural logarithm. The change-of-base formula is shown below.
Which inputs and units should I use?
The value and base must be positive, and the base cannot be 1. A base between 0 and 1 is allowed. No symbolic simplification is performed.
Can I check a worked example?
log₂(1024) = 10.
Are my input values uploaded or stored?
No. The calculation runs in this browser. Typed values are not sent to analytics, placed in the page URL or saved by the calculator. Copying or downloading is an action you choose.
Do I need an account or a paid plan?
No. The calculation, example, result copy and result card are available without registration. VISU services are an optional next step.