Guild Wars 2

I know there are a lot of usefull websites for craftingout there. But my question is, are there any sites that let you calculate how much items you can create out of the stacks you have.

What I mean (in my situation) is that I have a lot of mithril, elder wood and t5 mats. So I’m planning on making a lot of rare GS’s (l80) for the forge (to get precursor, I hope).

But I would like to know, how many Greatswords I can make with my stacks, and more important, how much mitril plated dowels, hilts and blades I must make to have the optimum amount.

Does such a website exist?? have looked, but didn’t find one myself.

I use pen&paper for that.