Calculators: Logarithm | Ratio | Doubling
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
Insert two values, the third will be calculated. Input values can be numbers e as Euler's number. The maximal value for the decimal places is 15.
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German: Logarithmus berechnen