Here is a link to the off line roll out calculator for windows.
Just unzip the file then click on it to install it
http://www.digital-works.org/IROCC/ORC1.5.msi.zip (http://www.digital-works.org/IROCC/ORC1.5.msi.zip)
And thanks to Adam on RCTECH for making it
-=light=-
I made this gear chart spreadsheet a few years ago:
Microsoft Excel format (http://abc123.dowco.com/~tom/rc/gear%20chart.xls)
OpenOffice format (http://abc123.dowco.com/~tom/rc/gear%20chart.sxc)
A bit easier than installing a program, if you've already got a spreadsheet program.
I have a few files online for download
www.digital-works.org/IROCC (http://www.digital-works.org/IROCC)