This site teaches a method of unit conversion called dimensional analysis, or the factor-label method.

Go to the "Learn" page from the navigation bar above to get started.
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​Website update (Oct 26, 2018):
-Now iPad compatible!
-HTML5!
-Works with all web browsers.
-New Unit Cancelling mode
Website re-designed by Benjamin Scherer
The content of this website is intended for use in non-profit educational settings. Educators and students may freely use this site and its contents under these conditions. All rights to the content of this site are reserved by Zach Jones and written permission is required for use of the site or reproduction of the content by for-profit groups. You may not move the tutorial applets to other websites under any circumstances without written permission. This tutorial is meant as a learning tool and it is not intended to be an authoritative statement on the subject matter. Use at your own risk.