Field, Machinery & Storage

Sprayer Calibration Calculator

Calculate gallons per acre and litres per hectare from nozzle flow, travel speed and nozzle spacing.

Free agriculture calculator

Sprayer Calibration Calculator

How to use the Sprayer Calibration Calculator

  1. Enter the requested field, crop, animal, equipment, or cost information.
  2. Keep every value in the unit shown beside its field.
  3. Select Calculate and review each result and assumption.
  4. Verify important decisions with local records, labels, extension guidance, or a qualified adviser.

Formula and method

GPA = 5,940 × nozzle flow (GPM) ÷ [speed (mph) × nozzle spacing (in)].

The standard broadcast-sprayer relationship calculates application volume and tank coverage.

Worked example

At 0.3 GPM, 5 mph and 20-inch spacing, output is 17.82 GPA and a 500-gallon tank covers about 28.1 acres.

Understanding the result

Treat the calculated values as a planning estimate. Compare them with your field records, product information, local conditions and operational capacity before acting.

Important: Calibrate with clean water and verify nozzle uniformity, label requirements, PPE and local rules.

Frequently asked questions

What measurements are needed for sprayer calibration?

Use measured nozzle flow, actual travel speed and nozzle spacing for the broadcast-sprayer formula shown on the page.

Why should nozzle output be measured with clean water?

A clean-water calibration provides a safer way to check flow and nozzle uniformity before mixing or applying a pesticide.

Does the calculator replace the product label?

No. Always follow the legally controlling product label, required PPE and local application rules.

Why are both GPA and L/ha shown?

The calculator reports US gallons per acre and the equivalent litres per hectare so the same calibration can be interpreted in either unit system.

Continue planning

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