What is the Logarithm Calculator?
A logarithm answers the question “to what power must I raise the base to get this number?” For example log₁₀(1000) = 3 because 10³ = 1000. This calculator gives the common log (base 10), natural log (base e), log base 2 and a log in any base you choose – plus the antilog.
How to use the Logarithm Calculator
- Enter the number (must be greater than 0).
- Enter a custom base if you need one.
- Read all logs at once.
Useful facts
- log(a×b) = log a + log b
- log(a/b) = log a − log b
- log(aⁿ) = n·log a
- Change of base: log_b(x) = ln x / ln b
This Logarithm Calculator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.
Last updated: · By NodifyTech