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written by Elizabeth Stapel
This page contains a step-by-step tutorial in converting between units. It begins with one-step conversions, progressing to problems requiring multiple unit conversion. Areas of frequent student difficulty are given extra attention by the author, who presents the tutorial in an informal writing style designed to engage high school students.

This tutorial is part of an award-winning collection of free resources developed to promote understanding and confidence in algebra.

Please note that this resource requires Flash.
Subjects Levels Resource Types
General Physics
- Measurement/Units
= Units and Dimensional Analysis
- High School
- Instructional Material
= Activity
= Problem/Problem Set
= Tutorial
Intended Users Formats Ratings
- Learners
- General Publics
- text/html
- application/flash
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Access Rights:
Free access
© 2000 Elizabeth Stapel, 2000
algebra tutorial, canceling terms, dimensional analysis, metric conversion, tutorial, unit cancellation, unit conversion
Record Cloner:
Metadata instance created August 14, 2009 by Caroline Hall
Record Updated:
January 23, 2013 by Caroline Hall
Last Update
when Cataloged:
February 6, 2008
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
E. Stapel, (2000), WWW Document, (
E. Stapel, Purplemath: Cancelling / Converting Units, (2000), <>.
APA Format
Stapel, E. (2008, February 6). Purplemath: Cancelling / Converting Units. Retrieved November 16, 2018, from
Chicago Format
Stapel, Elizabeth. Purplemath: Cancelling / Converting Units. February 6, 2008. (accessed 16 November 2018).
MLA Format
Stapel, Elizabeth. Purplemath: Cancelling / Converting Units. 2000. 6 Feb. 2008. 16 Nov. 2018 <>.
BibTeX Export Format
@misc{ Author = "Elizabeth Stapel", Title = {Purplemath: Cancelling / Converting Units}, Volume = {2018}, Number = {16 November 2018}, Month = {February 6, 2008}, Year = {2000} }
Refer Export Format

%A Elizabeth Stapel
%T Purplemath: Cancelling / Converting Units
%D February 6, 2008
%O text/html

EndNote Export Format

%0 Electronic Source
%A Stapel, Elizabeth
%D February 6, 2008
%T Purplemath: Cancelling / Converting Units
%V 2018
%N 16 November 2018
%8 February 6, 2008
%9 text/html

Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

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