Natural Log
Free Natural Log calculator with clear step-by-step results.
About Natural Log
The natural logarithm uses base e.
Formula
Formula
ln(x) = natural log
Worked example
With the default values below, Natural Log returns ln(value) of 2.99573. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Valueminimum 0
- 20
Results
- ln(value)
- 2.99573
- log10(value)
- 1.30103
- Value
- 20.00
Step by step
- 1Values used
- 2Formula
- 3ln(value)= 2.99573
- 4log10(value)= 1.30103
- 5Value= 20.00
Assumptions and limits
- The result is derived only from the single input listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 5 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How does this calculator work?
The natural logarithm uses base e.
Why does this matter?
Valid for positive inputs.