WinConverter 

WinConverter is a useful tool that allows you to convert a wide range of measurement unit types. It includes more than 1500 different units in 76 categories.

Its easy-to-use interface allows you to perform most of the functions directly from its main window and allows the simultaneous conversion of several units. You just need to select a category, select the unit you are converting from, and type the quantity to convert. The program will show the results of conversions automatically. If you do not know where a unit or category is located, you can use the Unit and Category Finder, and it will quickly show the possible matches.

What differentiates WinConverter from other similar programs is that it allows you to type and evaluate expressions with mathematical operators; it supports the conversion with combination of units, and allows you to record the conversion results with their operations to the clipboard.

Among other features, the program allows you to create and print conversion tables, and it doesn’t require an Internet connection to operate. So, at a reasonable price, this application lets you convert the most common unit types. If you are not sure to buy it, you can try it before making a decision.