Where do I get the latest version?

From our download page at http://tenderwire.com/download.html. There you will find full installation instructions to help you through the process.

How do I make Excel pick up the add-in?

If you have just installed the add-in, the functions should already be available to you.  See the Quick Start Guide or try opening one of the sample spreadsheets. They'll automatically complete the final installation step for you, if necessary.

How can I send a spreadsheet to another person without losing the results?

One option is to have your recipient also download and install the Unit Converter Add-in for Excel (after all, it's free). Without the add-in installed, the conversion functions will not work and you may lose the values displayed in your worksheet.  If your recipient only needs to view and not input new data you can ...

1. Save your current worksheet under a different name because you are about to alter it significantly.
2. Using the Edit menu, copy the range of cells whose values have been calculated by the Unit Converter functions.
3. From the Edit menu again choose "Paste Special"; a small dialog window will pop-up with a list of choices as radio buttons. Choose the option "Paste as Values" and then click OK.  You have now effectively frozen the values in the cells and may send this spreadsheet to someone without the functions in place.  You may have to repeat this process to cover all the cells you use the Unit Converter Excel functions within.
4. Close the altered spreadsheet and re-open your original saved spreadsheet to return to your work.

Will this add-in work in Microsoft Works?

We don't know for sure, but we think it should.

Is this add-in available for OpenOffice's Calc spread sheet?

We have no plans to port the UnitConverter to Open Office at the moment. If you'd really like us to let us know.

Is this add-in available for Excel on the Apple Mackintosh?

Unfortunately not and we have no plans to support Excel or Office applications on the Apple Mackintosh.

What should I do if I think a conversion is wrong or a unit I use is not included?

Please e-mail us with as much detail as you can at This e-mail address is being protected from spambots. You need JavaScript enabled to view it and we will address it as promptly.

Are there any examples?

Yes. In the installation directory, usually C:\Program Files\Tenderwire\UnitConverter\ unless you changed it, there are several example spread sheets which will help you get started. 

I get the following error when I try to use the UnitConverter Add-in: "A file needed by the UnitConverter Add-in is missing. It is expecting to find C:\Program Files\Tenderwire\UnitConverter\\libxml2.dll".  What's happening?

There was an issue on Windows Vista (Office 2007) in which some of the DLLs libxml2.dll that the UnitConverter depends on were missing. We have removed the dependency on libxml2.dll entirely from our software. Downloading the latest version should solve your problem. The error message has also been made more explicit for these circumstances should they arise again.