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calculate natural logarithm ln

Calculate Natural Logarithm (ln)

ln(x) is the logarithm in base e ≈ 2.71828. It is the inverse of eˣ: eˡⁿ⁽ˣ⁾ = x. Fundamental in calculus and exponential growth.

Notable values of ln

  • ln(1) = 0; ln(e) = 1; ln(e²) = 2. For x < 1 (and x > 0): ln(x) < 0. ln grows without bound but very slowly.

Examples

ln(1)

Input
x=1
Expected output
ln(1) = 0

e⁰ = 1.

ln(e)

Input
x=e
Expected output
ln(e) = 1

e¹ = e.

Full tool FAQ

log_b(x) = y means b^y = x. It is the inverse of exponentiation. Example: log₂(8) = 3 because 2³ = 8.

Frequently asked questions

Are ln and log the same?

No. ln uses base e; log usually uses base 10. Relation: log₁₀(x) = ln(x) / ln(10) ≈ ln(x) / 2.3026.

Does this page replace official or professional review?

No. It helps explain the scenario and use the tool more safely, but real decisions should consider official sources, full context and qualified guidance when needed.