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Calculate Logarithm


The logarithm for an user-defined base can be calculated as well as all inverse calculations. The logarithm is the inverse operation to the exponentiation (power function).

Formulas: logb(a)=x, a=bx


a (logarithmic number):
b (base):
x (exponent):



Decimal places:


Insert two values, the third will be calculated. Input values can be numbers e as Euler's number.

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German: Logarithmus berechnen


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