Assuming it's a Taylor K-200x kit, one drop for a 30Kgal pool indicates a need for 27.48 fluid oz.*, or a little over a fifth of a gallon. Unlike many on this board, I am a fan of the Acid Demand because I don't do well with those shades of red at 7.6+. So just add drops until the color is where you would like to get to and plunk in a fifth of a jug per drop plus a shot. Works great for me and no need for a computer at the pool. I also have a pitcher marked in ppm to use with LC (or bleach, just double the dose). KISS. I only use Pool Calculator for my every other Sunday full test routine.
*=from p. 54 of the Taylor Water Chemistry booklet Part #2004B that came with my ancient K-2000. I'm sure there is a newer one now.