Sprayer Calibration Calculator
A sprayer is meant to put out a set amount per acre, but the real amount changes with pressure, speed and nozzle wear. Catching a little output and entering it here shows what the sprayer is applying.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Measure the liquid caught from one nozzle over a run of known distance. The ground that nozzle covered is its spacing times that distance.
The liquid divided by that ground is a depth of spray. Converted to gallons over an acre, it gives gallons per acre. Run the test at the speed you spray.
Worked example
A nozzle that catches 32 fl oz over a run of 100 ft, with 20 in between nozzles, puts out 65.3 gallons per acre.
Questions
How long should the catch run?
Long enough to fill a measuring cup easily, often a minute at a steady speed. A longer run gives a more accurate catch.
Should I check every nozzle?
Check several. Nozzles wear unevenly, and one that flows well off the others shows up quickly in a catch.
Does the label rate settle it?
Not always. A label rate is a target, and your actual output depends on pressure, speed and nozzle wear. Calibrate before each season.
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