I have used Wheelcalc for determining spoke lengths for years and it had never let me down..........until now.
I plugged in all the pertinent data for some touring wheels and ordered the resultant lengths of spokes.
The are all about 2mm too short! (I did round down all decimals after researching.)
I laced the front wheel and, though I am not fully tensioned as of yet, there are about 3 threads showing at the nipple.
I tried another program on the web using the same criteria and it gave me lengths that appear to be more appropriate.
What a bummer!! (Not to mention the $$$$ down the tubes.) Ah, well, more inventory.
I may be able to use the NDS spokes on the DS of the rear wheel, but that's about it.
I guess I'll just get the longer lengths.
I fear that. since the spokes don't make it all the way to or near the top of the nipples that I may wind up breaking nipples.
I don't want to risk that on a loaded touring bike.

What spoke calculators do y'all find most consistently accurate?