Insecticide Dilution Calculator

This calculator applies the standard C1V1 = C2V2 dilution equation used across pesticide labels: the concentrate's active-ingredient percentage times the volume of concentrate you add must equal your target finished-solution percentage times your total tank size. Rearranged, that gives Concentrate Needed as (Target Rate ÷ Concentrate Strength) × Tank Size, converted from gallons to fluid ounces (×128) since that's how concentrate is measured on a product label and in most sprayer instructions. Whatever tank volume isn't concentrate is made up with water, calculated as the simple remainder. Coverage Area assumes the common label convention of 1 gallon of finished (already-diluted) solution treating 1,000 square feet — a reasonable default for general perimeter and surface applications, though actual coverage varies by product and target pest, so always defer to your specific label's stated application rate if it differs.

Application Rate is reported back in ounces of concentrate per gallon of finished solution as a sanity check against your product label's own mixing chart. The default values (25.1% concentrate, 0.06% target rate) mirror the label rate for Demand CS, a common professional pyrethroid, but every product's active ingredient percentage and labeled target rate differ — always pull both figures from your actual product's label rather than assuming these defaults apply. Using the wrong target rate is the most common mixing error: too weak underdoses and fails to control the pest, while over-concentrating violates the label (a legal requirement, not just a guideline) and risks harming non-target organisms or leaving illegal residues.