The results are not applicable to self-propelled irrigation systems such as center pivots, linear moves, or hose-reel systems..
This calculator uses this formula to determine the run time of an irrigation system.
= The time the irrigation system needs to run (hrs)
= The watering interval of the system (day)
= Crop Water Use (in/day)
= Application Rate of the system (in/hr)
= The efficency of the irrigation system (as a decimal)
Reference: Washington State University