Unit Converter is an unique Microsoft Excel add-in, with few clicks of mouse you can easily create dropdown boxes of your own choices of units, from large number of units, in excel cells. With another few clicks you can link the dropdown boxes with the cell or ranges of cells. You don't require any knowledge of macro or vba programming to use this add-in. The conversion does so automatically by selecting desired unit from the dropdown box, even you don't have to write any formula on formula bar nor you have to remember any conversion factors. After building your excel file, you can easily modify dropdown boxes and the linked cells with few more mouse clicks. You can easily distribute the excel file to your customer, they don't have to purchase Unit Converter add-in to use your file. The good news is that, we have a Unit Converter runtime which is absoultly free of cost and can be downloaded from our website.