Logarithm Calculator

Calculate logarithms in any base with presets for log10, natural log and log2 plus antilog and change of base formula

Number

Base

Custom Base

Logarithm

2.000000

log10.00(100) = 2.000000

Antilogarithm (Inverse)

100.000000

10.00^2.000000

Common Log Values

log10(100) = 2.000000

ln(100) = 4.605170

log2(100) = 6.643856

Change of Base Formula

log_b(x) = ln(x) / ln(b) = log10(x) / log10(b)

log_10.00(100) = ln(100) / ln(10.00)

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