Have a look at my new spoke length calculator web app!

But what about the cost of the spokes?!?!!?! I would have used your calculator in good faith that it was accurate. What if i ended up with £40 worth of unusable spokes that I couldn't get a refund on?!!?!

I am forcing no-one to use this and encourage discussion about it on here. If you find something that isn't right, put it in this thread.

As I said, the calculator uses the same formula as Damon Rinard's one, which has a large amount of credibility and was recommended by Sheldon Brown.