Log Calculator

In mathematics, the logarithm of a number to a given base is the power or exponent to which the base must be raised in order to produce that number.

If x=by, then y = logb(x)

where b is the base.

Please provide any one value of the following to calculate the other one.

= log
base: e   10   2   other

RelatedScientific Calculator | Exponent Calculator

Basic Log Rules

logb(x·y) = logb(x) + logb(y)

logb(x/y) = logb(x) - logb(y)

logb(xy) = y·logb(x)

logb(x) = logk(x)/logk(b)