Interactive formulas, label reference, and calibration practice
GPA = gallons per acre, GPM = nozzle output (gal/min), MPH = travel speed, W = nozzle spacing in inches. The constant 5,940 converts the units.
How much product per unit area. Expressed as lbs/acre, oz/1,000 sq ft, or gal/acre depending on the label.
How much concentrate to add to water. The label rate is usually given in oz per gallon.
AI = active ingredient. Used to determine the concentration of a mixed solution as a percentage.
For irregular shapes, break the area into simple shapes and add the results together. Always work in feet, then convert to acres at the end if needed.
Toxicity Category I is the most toxic. DANGER may include the word "POISON" and a skull-and-crossbones symbol. Lower LD50 = more toxic.
