Explanation of Secondary Unit Worksheet Terms:

This worksheet allows you to add new measurement units to an existing measurement class.  If you need to create a new measurement class, you should use the Primary Conversion Worksheet.

Once you’ve selected the measurement class of your new measurement unit, you then select the name of the Primary Measurement unit you want to build a conversion to.  Once you’ve got that conversion factor working, then your new measurement unit will convert to all other units in that measurement class.   As you type in the conversion factor (with Multiplicative and/or Additive components) to convert to the Primary unit, the Inverse conversion factor information (converting from the Primary unit back to your new Measurement unit) will be automatically filled in.  If you have some kind of unusual situation in which the inverse relationship is not correct, you have the opportunity to change it.

Unit Converter only allows multiplicative and additive functions in the conversion equations, which covers most conversion situations.  This current version offers no options for including trigonometric, logarithmic or exponential functions, although some have been hard-coded in the software in order to convert between % Slope and Degrees of Slope, and conversions between the areas of a circle and the diameter or circumference of that circle.

This process can be confusing, so pay careful attention to the Conversion Equation and Inverse Equation as you enter your conversion data to make sure they are doing what you want.  Also make sure to test your conversion with values you know are accurate.  If the “Test Conversion” button gives you what you expect, then you can be confident that your conversion information is accurate.

Once the conversion factors are working, you may elect to enter additional information on your measurement units such as the name for a single unit of that measurement unit (such as Foot instead of Feet).  Unit Converter occasionally makes use of this Singular name such as in the one-to-one conversions.  If you don’t enter a value for the singular name, Unit Converter will just use the plural of the name.  You can also enter a definition of your unit which will appear in the definition boxes.

The Secondary Conversion worksheet is shown below.  Click on any part of it to see an explanation of that function: