Logarithm calculator

log_b(x) = ln(x) ÷ ln(b)

log_b(x)
log₁₀(x)
ln(x)
log₂(x)

About this tool

Logarithm calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.

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