(A) GeoCalc: SIMPLE and RELEVANT, compare current setup (L/H) with new LONGER SUSPENSION FORK setup on (R/H). However this does NOT auto calc that a longer fork will raise the bottom bracket higher from the ground, hence without this "correct b/b height length", then the quoted angles will be incorrect. With it, looks good.
it does recalculate the bottom bracket height. right in the middle it says "bb height" which is the height difference between the hub axles and the bottom bracket.