We do a lot of number crunching here, and Microsoft Excel is the lazy engineers best friend. We write an Excel spreadsheet for just about anything we have to calculate more than once.
Since I don't want to be accused of laziness and selfishness I decided to make some of these spreadsheets available to the rest of you. There's not much here right now, but I will add more as time goes on.
If you left click the link, the spreadsheet will open in your browser. If you right click the link, and then choose "Save Target" from the list, the spreadsheet will be saved to your hard drive.