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Pesticide mix-rate and label-rate converter

Quotable answer

How do I convert a pesticide label rate into how much to mix?

Select the exact unit the label prints (percent, parts per million, ounces of product per acre, or pounds of active ingredient per acre), enter the label's number and your tank size, and add your calibrated output rate for the two per-acre units. The converter shows ounces of product per gallon and per tank, with the arithmetic that produced it.

Mix-rate converter

Label-rate and mix-rate math

Enter the label's target rate exactly as it is printed, in whichever unit the label uses, and your tank size. The workflow converts to ounces of product per gallon of water and per full tank, with the unit conversion shown.

Don't know your output rate yet? Run the guided calibration workflow for your equipment first, it computes and carries the number into this same mix-rate step automatically.

Backpack Boom Airblast Granular Output-rate reference

The pesticide label is the legal controlling document. This tool is a study and planning aid, never a substitute for label directions.

FAQ

Common questions

Frequently asked questions

How much pesticide should I mix per gallon of water?
It depends entirely on the label's stated rate and unit. Enter the label's rate exactly as printed (percent, ppm, ounces per acre, or pounds of active ingredient per acre) along with your tank size and, for the two per-acre units, your calibrated output rate, and the converter shows ounces of product per gallon with the conversion arithmetic.
What is the difference between percent and parts per million?
Both describe concentration, but at different scales: percent is parts per hundred, parts per million (ppm) is parts per million, so 1 percent equals 10,000 ppm. Confusing the two produces a mix that is 10,000 times too strong or too weak, one of the most common label-reading errors.
Why do I need my output rate to convert an ounces-per-acre rate?
An ounces-per-acre rate tells you how much product to apply to a given area, but converting that into how much to add to a specific tank requires knowing how many gallons of water actually cover that same acre, which is your calibrated output rate. Run the calibration workflow for your equipment first if you do not already know it.