Calculate logarithms with any custom base. Also shows ln(x), log₁₀(x), and log₂(x) for quick reference.
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Quick answers to common questions
log_b(x) answers: "To what power must b be raised to get x?" If b^y = x, then log_b(x) = y.
ln(x) is the logarithm with base e (≈ 2.71828). It is widely used in science and finance.
No. Logarithms are only defined for positive real numbers.
Base 10 (log₁₀) in science, base 2 (log₂) in computing, and base e (ln) in calculus and growth models.
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