Example: Number: 1,000 · Base (10, 2, or e ≈ 2.718): 10 → log: 3.
Natural log (ln): 6.907755
Log base 10: 3
Log base 2: 9.965784
Frequently asked questions
How do I calculate logarithm? Enter your numbers above and the result updates instantly. For example: Number: 1,000 · Base (10, 2, or e ≈ 2.718): 10 → log: 3.
Is this Logarithm Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for logarithm. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.