Natural Log Calculator
Calculate the natural logarithm (base e) of any positive number.
Calculate
Enter your values below.
Result
ln(x)
0
Formula used
ln(x) = log base e of x, where e ≈ 2.71828
Example: ln(10) ≈ 2.3026.
How to use this calculator
- Enter Number.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
Why must the number be positive?
Natural log is only defined for positive real numbers.
What is ln(1)?
0.
What is ln(e)?
1, by definition.
How is this different from log base 10?
Natural log uses base e (≈2.71828); use the Log Calculator for base 10.