SprayMaster: Spray Calculator

SprayMaster is the fast, no-nonsense calculator for licensed pesticide applicators — ag, turf, ornamental, pest control, and right-of-way.

FREE • Tank Mix — turn any label rate (per acre, per 1,000 ft², or per gallon) into exactly how much product goes in the tank, plus acres per tank and whole-job totals. • Mix Ratio — quick dilution for handheld and backpack sprayers, with the equivalent percent solution.

PRO • Sprayer Calibration — find your true gallons-per-acre by the nozzle & speed formula or the 1/128-acre catch method (the one on the cert exam). • Rate Converter — lb/acre ↔ oz/1,000 ft², % ↔ oz/gal, and more. • Area / Acreage — size a field from ground measurements. • Calculation history, and no ads.

The label is the law. SprayMaster does the arithmetic; you follow the product label, its restrictions, and your state's regulations. It ships no product rates and makes no recommendations.

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