Natural logarithm Calculator

Free natural logarithm calculator to calculate natural logarithm. Instant results in your browser — no signup.

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You can still read how Natural logarithm Calculator works, the formula, examples, and FAQs below.

x (x > 0)

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Inputs

x (x > 0)

Results update when you click Calculate.

ln(x)

2.995732

e^2.995732 ≈ 20.0000

log₁₀(x)

1.301030

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What this result means

Free natural logarithm calculator to calculate natural logarithm. Instant results in your browser — no signup. ln(x) is the inverse of e^x; ln(e) = 1.

Assumptions

Rule dependency: Universal formula.

How is it calculated?

ln(x) is the inverse of e^x; ln(e) = 1.

Example

ln(20) ≈ 2.995732.

Frequently asked questions

What is e?+

Euler's number ≈ 2.71828.