Homelogarithm calculator

Logarithm Calculator

Calculate log base b, natural log (ln), log\u2081\u2080, and antilogarithms.

FunctionValue
log₁₀(100)2
ln(100) — natural log4.6051702
log₂(100)6.6438562
log10(100) — custom base2
Antilog₁₀(100) = 10^1001e+100
e^100 (antilog natural)2.6881171e+43

Common logarithm values

log₁₀(1) = 0
log₁₀(10) = 1
log₁₀(100) = 2
ln(1) = 0
ln(e) = 1
log₂(2) = 1
log₂(8) = 3
log₂(1024) = 10
ln(e²) = 2

Frequently Asked Questions