Agricultural Sprayer Calibration & Nozzle Flow Rate Calculator
Calculate broadcast field sprayer application rate (GPA), individual nozzle output (GPM & Ounces/Min), required operating pressure (PSI), and total chemical tank mix batches.
Sprayer Operating Parameters
GPA
Gallons per acre per chemical label.
MPH
Ground speed across field.
in
Distance between nozzle bodies (typically 15", 20", or 30").
ft
Effective spray swath width.
Tank Capacity & Pressure Adjustment
gal
PSI
Standard rated nozzle chart pressure.
Required Nozzle Flow Rate
06 BLUE / 08 WHITE NOZZLE
Required Flow per Nozzle
0.61 GPM
77.6 oz/min (fluid)
30-Second Catch Jar Target
38.8 oz / 30 sec
Catch per nozzle during calibration
Total Boom Flow Rate
32.7 GPM
54 nozzles on 90 ft boom
Acreage per Tank Load
66.7 Acres
130.9 acres/hr capacity
Calibration Catch & Speed Table
Flow in 15 Seconds (Quick Catch):
19.4 fl oz
Flow in 60 Seconds (Full Gallons):
77.6 fl oz (0.61 gal)
1/128th Acre Calibration Distance:
204.2 ft (for 20" nozzle)
Recommended ISO Tip Size:
ISO 06 (Grey/Blue) or 08 (White)
USDA & University Extension Formula
Sprayer Engineering
Calculated via standard agricultural engineering constant: GPM = (GPA × MPH × W) / 5940, where W is nozzle spacing in inches. Catch tests with water should be within ±5% across all boom nozzles. Replace any nozzle tip deviating more than 10% from the boom average.