Natural Log Calculator Reference Values

Calculate the natural logarithm ln(x) using base e for positive inputs.

Author

Dr. Fatima Al-Rashidi

Math editorial contributor

Kuwaiti epidemiologist trained at Johns Hopkins, leading WHO initiatives on maternal health in the Gulf region

Reviewed for accuracy by

Dr. Isabella Rossi

Math content reviewer

Italian neuroscientist at Sapienza University of Rome, studying the neural mechanisms of bilingual language processing

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

Table of Contents

  1. All value pages
  2. Reference table
  3. FAQs
  4. Methodology and review
  5. Related conversions

Reference Value Index

This page lists 20 reference values for quick browsing and lookup.

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All Reference Values

Reference Table

Natural Log Calculator reference values
Number (x)Natural Log ln(x)
0.1 Number-2.302585 ln(x)
0.2 Number-1.609438 ln(x)
0.25 Number-1.386294 ln(x)
0.5 Number-0.693147 ln(x)
0.75 Number-0.287682 ln(x)
1 Number0 ln(x)
2 Number0.693147 ln(x)
3 Number1.098612 ln(x)
4 Number1.386294 ln(x)
5 Number1.609438 ln(x)
6 Number1.791759 ln(x)
7 Number1.94591 ln(x)
8 Number2.079442 ln(x)
9 Number2.197225 ln(x)
10 Number2.302585 ln(x)
20 Number2.995732 ln(x)
30 Number3.401197 ln(x)
50 Number3.912023 ln(x)
75 Number4.317488 ln(x)
100 Number4.60517 ln(x)

Frequently Asked Questions

Frequently asked questions for Natural Log Calculator and its reference values.

What does the Natural Log Calculator calculator do?

It calculates working with exponential growth/decay, continuous compounding, and scientific models from the values you enter.

What formula does the Natural Log Calculator calculator use?

Natural log is the logarithm base e: ln(x).

What inputs are valid?

For real-number results, enter x > 0.

When would I use this?

working with exponential growth/decay, continuous compounding, and scientific models

Methodology and Review

Each row on this page links to a value detail page derived from the same conversion data file as the main calculator and reference table. This reduces inconsistencies across page variants.

Editorial metadata and structured data are rendered across the converter page and linked value pages. Review policies are documented in our review process and editorial policy.