Herbicide Mix Calculator

Product per Tank is set entirely by your tank's capacity, the carrier (water) volume you apply per acre, and the product's label rate -- those three numbers determine how many acres one tank load covers and how much product that requires. Acres to Spray only determines how many tank loads the whole job needs, not the mixing ratio inside any single tank.

A higher carrier (water) volume per acre means each tank load covers fewer acres before running dry, since the tank's total capacity is fixed. Since Product per Tank is the acres one tank covers times the label's per-acre product rate, covering fewer acres per tank naturally means less product goes into that tank -- even though the total product needed for the whole field doesn't change.

No -- the defaults shown here are generic illustrative examples, not a recommendation for any specific product. Herbicide label rates vary substantially by product, target weed species, crop, and growth stage, so always enter the exact rate printed on your own product's label rather than relying on these defaults, since applying too much product can damage your crop and violate label law.

No -- Surfactant Rate only determines how much surfactant (adjuvant) to add, calculated separately as a percentage of your total spray solution volume. It has no effect on Product per Tank or Total Product Needed, which are determined solely by your tank size, carrier volume, acres, and the herbicide's own label rate.

The calculator rounds up to the next whole tank load, since a sprayer can't mix a fraction of a full tank cycle -- if your field's total spray solution volume doesn't divide evenly into your tank size, your last tank load will be partially full, which is normal and expected in real spray operations.