This resource is a digital tool for performing unit conversions.  It provides the additional feature of displaying cancellation of terms, enabling users to gain a deeper understanding of the mathematical processes involved in converting units.  Users can convert among 25 quantities, including units such as force, temperature, energy, and current.  Also available are less commonly used units, such as illuminance and magnetic flux. In addition, the calculations respect the number of significant figures.  It is part of Web-Based Computer Aided Instruction, a set of free resources for teachers and learners.

Please note that this resource requires Java.