Can these calculations tell me how much yarn I will need for my project, provided I put in the correct measurements and ball band information?
That's a another great suggestion, Claire. I didn't try to tackle the yardage requirement yet. I think it would also depend on the gauge so it gets to be a pretty tricky calculation. I'll try to come up with a way to make a reasonable suggestion. Since it will be just an estimate, perhaps I should make it a liberal suggestion.
Of course it would be impossible to do yardage estimates if the sweater is being worked in multiple colors or especially in Fair Isle as there would be no way to know how much of each color you are planning to use, But perhaps it would at least be good to know the yardage required for an all Stockinette sweater.
I'll work on that.