Logarithm Calculator.

Calculate a logarithm for any valid positive base and argument.

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02 / RÉPONSE

Argument (x)

Base (b)Greater than 0 and not 1

Greater than 0 and not 1

Presets

Comment utiliser

A logarithm answers the question: what exponent on the base gives the argument? For example, log₂(8) = 3 because 2³ = 8.

For a real logarithm, the argument must be greater than 0, and the base must be greater than 0 but not equal to 1. Bases between 0 and 1 are valid and produce a decreasing logarithm.

FAQ

What is a logarithm?

A logarithm is the exponent needed to raise a base to a given positive argument. For example, log₂(8) = 3 because 2³ = 8.

Which bases are valid?

For real logarithms, the base must be positive and different from 1, and the argument must be greater than 0.

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