Help calculating wheel offset after relipping

[Lotek]

I was looking at buying a second hand pair of VS-XX's that are 18x7.5 +45.
They already have a 37mm lip according to work's site so I was wondering what the offset would end up being if I were to relip the wheels bringing the total width to either 8.5, 9 & 9.5.
I've tried calculating it but I'm not sure if I'm right so yeah.

Thanks

[devin2589]

http://www.workwheelsusa.com/media/wheels/26/75/WORK%20VS-XX%20Spec.pdf

according to that, if you leave the lip size the same and just widened the wheels it would be. 8.5et+57, 9.0et+64, 9.5et+70

[Lotek]

Forgot to mention I want to make the wheels wider by getting bigger outer lips

[Zic]

All you need to know. Have fun.

+1" lip = -12.7mm offset
+.5" lip = -6.35mm offset
-.5" lip = +6.35mm offset
-1" lip = +12.7mm offset

+1" barrel = +12.7mm offset
+.5" barrel = +6.35mm offset
-.5" barrel = -6.35mm offset
-1" barrel = -12.7mm offset

*edit, there are plenty of stickies, go look at them before you ask questions.

[Lotek]

Whoops my bad I somehow missed that post in the sticky!
Thanks for the help though