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Logarithm Calculator
Calculate log base 10, natural log (ln), log base 2, or any custom base. Includes antilog and change of base formula.
Logarithm
Antilog (Inverse)
Given y and base b, find x = b^y
Log Identities
log(a × b) = log(a) + log(b)
log(a / b) = log(a) - log(b)
log(a^n) = n · log(a)
log_b(x) = ln(x) / ln(b)
log_b(b) = 1
log_b(1) = 0