There is a site called spincraftpatterns.com that has a free Top Down Cardigan Pattern.
Though I admit, I dislike it that the site requires a credit card to get the pattern. They don't charge anything to the card, but still. I really don't like giving out the info.
Their patterns are set up so you can create a custom piece with some measurements & gauge. It will then allow you to calculate how many stitches to cast on, etc..
I have put it into a Word document that is linked to an Excel spreadsheet. I figure this is much easier than having to do the calculations each time. I suspect it might be useful, so I would share it.
I think I have set it all up correctly. But please, if you give it a try and see an error, let me know.
The Word document is linked with the spreadsheet. So you will have to have both the Word document & the spreadsheet for it to work correctly.
You might need to reset the links. I know Office is fussy about the locations.
Custom Top Down Raglan Sweater Word Doc
I should see if I can create a pdf to handle the entire thing. However, I am really not up for tinkering with it any more today. I do loathe MS Office. But it was the quickest way I could think of to do it.