I don't know if this has been shared before. (if it has sorry) But I just came across this and wanted to share

Fabric calculator: http://search.quiltshops.com/calculator/calculator.htm

Binding calculator: http://www.quiltpox.com/calculators.html

and oh la la this one will tell you borders, backing, and more:
http://vrya.net/quilt/flash/QuiltCalc_Loader.html

and this is where I found them: http://www.martindalecenter.com/Calculators1_1_AB.html#ART-KNIT-QUILTING

you can find knitting calculators and more at this site!