About this tool
Calculate logarithms in any base, plus the natural, common and binary logarithms.
log_b(x) = ln(x) ÷ ln(b). The natural log uses base e ≈ 2.71828.
Formula: log_b(x) = ln x / ln b
Example: Number = 1,000, Base = 10 → log in your base = 3, Natural log (ln) = 6.907755.
x must be positive, and the base must be positive and not 1.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Logarithm Calculator work?
log_b(x) = ln(x) ÷ ln(b). The natural log uses base e ≈ 2.71828.
What should I keep in mind?
x must be positive, and the base must be positive and not 1.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.