Calculate logarithms with any base. Find log base b of x, the exponent to which b must be raised to produce x.
Calculate logarithms with any base. Find log base b of x, the exponent to which b must be raised to produce x.
The number to take the logarithm of (must be positive).
The base of the logarithm (must be positive and not 1).
Computes the logarithm using the change of base formula: log_b(x) = ln(x) / ln(b).
How this calculator works
Computes the logarithm using the change of base formula: log_b(x) = ln(x) / ln(b).
Common questions about this calculator
