Irrigation in the Pacific Northwest

Calibration of Liquid Fertilizer Flow

The calibration calculator helps growers calibrate their injection pumps by ensuring that the pumps are injecting at the proper rate. A pump running at the set injection rate should fill the given container size within the calculated time. If it fills in less time, the pump is injecting too fast. If the pump does not fill at the end of the fill time, it is pumping too slow.

Learn more about the units used on this page.


Set Injection Rate:
Container Size:
Fill Time:



WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226,