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Natural log (ln x)
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Common log (log₁₀ x)
Frequently Asked Questions
What is a logarithm?
log_b(x) answers the question “to what power must the base b be raised to get x?”. For example log₁₀(1000) = 3 because 10³ = 1000.
How do you compute a log in any base?
Use the change-of-base rule: log_b(x) = ln(x) ÷ ln(b). The logarithm is only defined for a positive number x and a positive base b other than 1.
Calculate the logarithm of a number in any base, plus its natural log and common log.