See, now I know I have problems because I'm replying to myself... I've published my calculations on icehouse dimensions here: http://spreadsheets.google.com/pub?key=pQXVFuMgaZmfQV3e1uPrOKw Google's spreadsheet app doesn't handle the display of fractions (like MS Excel) so the best I can do (without a lot more work) is decimal forms. If you download the file (which I'm not sure if you can, someone try it and tell me) the second sheet gives the nice pretty rounded fractional values. -- - |) () /\/