If logarithms seem like Greek to you, this interactive algebra 2 lesson will help you sort things out. We can use many bases for a logarithm, but the bases most typically used are the bases of the common logarithm and the natural logarithm. The common logarithm has base 10, and is represented on the calculator as log(x). The natural logarithm has base e, a famous irrational number, and is represented on the calculator by ln(x). The natural and common logarithm can be found throughout Algebra and Calculus.

What Are Natural and Common Logarithms?


This video is courtesy of Bill White (YouTube)

Citation styles

APA style
What Are Natural and Common Logarithms?. (2013, March 2). In ClassBrain Math Tutorials. Retrieved 05:24, November 23, 2017, from http://www.classbrainmath.com/natural-and-common-logarithms/
MLA style
Cynthia Kirkeby, “What Are Natural and Common Logarithms?.” ClassBrain Math Tutorials. 2 March 2013, 11:02 UTC. . 23 Nov 2017 <http://www.classbrainmath.com/natural-and-common-logarithms/>.
MHRA style
Cynthia Kirkeby, 'What Are Natural and Common Logarithms?', ClassBrain Math Tutorials, 2 March 2013, 11:02 UTC, <http://www.classbrainmath.com/natural-and-common-logarithms/> [accessed 23 November 2017]
The Chicago Manual of Style
Cynthia Kirkeby, “What Are Natural and Common Logarithms?.” ClassBrain Math Tutorials, http://www.classbrainmath.com/natural-and-common-logarithms/ [accessed November 23, 2017].
CBE/CSE style
Cynthia Kirkeby, What Are Natural and Common Logarithms? [Internet]. ClassBrain Math Tutorials; 2013 March 2, 11:02 UTC [cited 2017 Nov 23]. Available from: http://www.classbrainmath.com/natural-and-common-logarithms/.
Bluebook style
What Are Natural and Common Logarithms?, http://www.classbrainmath.com/natural-and-common-logarithms/ (last visited Nov. 23, 2017).
AMA style
Cynthia Kirkeby, What Are Natural and Common Logarithms?. ClassBrain Math Tutorials. March 2, 2013, 11:02 UTC. Available at: http://www.classbrainmath.com/natural-and-common-logarithms/. Accessed November 23, 2017.