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# Logarithm

##### This online calculator outputs logarithm of a number to a given base, as well as natural logarithm and common (decadic) logarithm
Timur2009-06-22 19:49:03
This online calculator outputs logarithm of a number to a given base, as well as natural logarithm and common (decadic) logarithm.

Also, since our calculators use Javascript, and it includes only natural logarithm function, this change of base rule proves to be very useful:
$log_a b =\frac{log_c b}{log_c a}$
Logarithm
Logarithm to a given base: