Spray Nozzle Calculator

Nozzle flow fit for GPM, speed, spacing.

Application rate (GPA)

Ground speed (mph)

Nozzle spacing (in)

Field size (acres)

Spray pressure (PSI)

Tab to move between fields

GPM per nozzle

0.25

Catalog GPM @ 40 PSI0.25

Total spray volume (gal)600

Total boom output (GPM)9.09

Acres per hour0.6

Spray time (min)3,960

How to Use This Calculator

How the result changes with Application rate (GPA)

Application rate (GPA): Target gallons per acre from the product label.
Ground speed (mph): Travel speed of the sprayer in the field.
Nozzle spacing (in): Distance between nozzles on the boom (commonly 20 in).
Field size (acres): Total area to be sprayed.
Spray pressure (PSI): Operating nozzle pressure. Flow scales with the square root of pressure.

GPM per nozzle: Required flow rate per nozzle to achieve the target GPA.
Catalog GPM @ 40 PSI: Look for this GPM rating in nozzle catalogs at 40 PSI reference.
Total spray volume (gal): Total gallons of spray mix needed for the field.
Total boom output (GPM): Combined flow from all nozzles on a 60-ft boom.
Acres per hour: Field coverage rate at given speed and 60-ft boom.
Spray time (min): Estimated time to spray the entire field (excluding refills and turns).

Identify Input Parameters
4 parameters
Application rate (GPA) = 15, Ground speed (mph) = 5, Nozzle spacing (in) = 20, Field size (acres) = 40 = 5 input(s) provided
Calculate GPM per nozzle
GPM per nozzle = (applicationRateGPA * groundSpeedMPH * nozzleSpacingIn) / 5940
0.253 = 0.253
Calculate Catalog GPM @ 40 PSI
Catalog GPM @ 40 PSI = gpmPerNozzle / pressureCorrectionFactor
0.253 = 0.253
Calculate Total spray volume
Total spray volume = applicationRateGPA * fieldAcres
600 = 600