Help setting up watering for a zone of trees and roses using drip emitters

How do you calculate in/hr from gph of your emitters? I found this here watering - How to convert inches to gallons? - Gardening & Landscaping Stack Exchange which says to essentially add up the gph of all emitters, convert to gpm, then plug into the formula (96.25 * gpm)\area. So my current zone (I know it’s probably not balanced well, but just for the sake of understanding the math) has a total gph of 26 and area of around 95.

26gph \ 60 = 0.433gpm
(96.25 * 0.433) / 95 = 0.439 in/hr

Does that math seem right?
 
 
 
Also, I did change up the zone some since the bug post, moving the spray heads from this zone. Both zones are drip irrigation lines, with the spray heads being those little red/blue 90/180 deg sprays. All sprayers are on the other zone and those are mostly pots which we’ll run once to twice a day to keep the soil in the pots damp, adjust the flow of each nozzle so they are all about the same dampness.