I tried the online Orbit calculator and it's confusing. I'm not confident with using the runtime that it is giving because it asks for your soil type, and depending on what you answer, the numbers change. I don't want soil type factored into my number because I wanted the Rachio software to handle that calculation and I don't want my soil type to be factored in twice.
I ran my sprinklers for 10 minutes in a single zone. I have 8 fixed head sprayers in this zone. The catch cups catch 16 square inches each, and I put down 11 catch cups. The cup with the lowest amount was 20 mL and the cup with the highest amount was 95mL. The average was 53mL.
So I know that on average, in 16 squares inches of area, 53mL falls in 10 minutes, and I'm using 8 nozzles to do that. I'm not sure what to do with those numbers to get an inches per hour for my nozzle type.