Flea & Tick Coverage Calculator

For a treatment area in square feet, get the finished gallons of mix to make and how much IGR plus adulticide concentrate go in each gallon.

Treatment area

Measured treatment area. For irregular rooms, break into rectangles and add. Switch the toggle for acres or m².

Unit

sq ft acres m²

Coverage per gallon

Coverage per finished gallon

How many square feet one finished gallon covers. Common anchors: ~1,000 sq ft broadcast, ~1,500 sq ft for carpet/IGR — but your product label governs.

Presets:

Products to mix

Products

IGR + Adulticide IGR only Adulticide only

IGR label rate

IGR rate

From the IGR label, e.g. '1 fl oz per 1,500 sq ft' (Precor-style). Switch the toggle if your label is written per gallon.

IGR rate basis

Adulticide label rate

Adulticide rate

From the adulticide label, e.g. '1 fl oz per 1,000 sq ft.' IGRs don't kill adult fleas, so the standard protocol tank-mixes an adulticide too.

Adulticide rate basis

Output

Output measuring unit

The unit the per-gallon and total doses display in.

Active-ingredient sanity check (optional)

Enter the active-ingredient % printed on a concentrate to see the resulting %AI in the finished mix. Blank skips it.

IGR %AI of concentrate

Adulticide %AI of concentrate

Finished gallons to mix

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Enter a treatment area to see finished gallons and the IGR + adulticide dose per gallon.

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How this is calculated

The finished mix is sized from your treatment area and how much one gallon covers, then each product's dose is split into per-gallon and total amounts.

A. Finished gallons
   exact_gallons = area_sqft / coverage_sqft_per_gallon
   gallons       = ceil(exact_gallons)   // a partial remainder is still a batch

B. Per-product dose (per-AREA label)
   rate_per_1000   = label_rate × (1000 / label_area)   // per-1,500 → × 1000/1500
   total           = (rate_per_1000 × area_sqft) / 1000
   per_gallon      = total / gallons

   Per-GALLON label (e.g. Precor "1 oz per gallon")
   per_gallon      = label_rate            // kept exactly as read
   total           = per_gallon × gallons

C. Active-ingredient check (optional)
   %AI_in_mix      = (%AI_concentrate × fl_oz_in_tank) / (gallons × 128)
                     // 1 US gallon = 128 fl oz

Why two products: the standard flea protocol tank-mixes an IGR (insect growth regulator — stops eggs/larvae developing) with an adulticide (kills adult fleas), because IGRs alone don't kill adults. We size each separately so you can read off ounces of each per gallon.

Basis-aware rates: per-area labels derive the total from your area; per-gallon labels keep the per-gallon dose equal to what you read off the label and derive the total. Either way the per-gallon and total figures come from full precision, so they stay internally consistent.

The coverage anchors (1,000 sq ft broadcast, 1,500 sq ft carpet/IGR) and the Precor 1 oz / 1,500 sq ft IGR rate are illustrative defaults, not assertions about any specific product — your EPA label governs.

Sources: DIY Pest Control — square-footage pest-spraying guide (the per-1,000-sq-ft formula and the %AI check); HowToPest — Precor IGR Concentrate (the 1 oz / 1,500 sq ft anchor and "must be used with an adulticide"); SprayCalc Pro — insecticide application calculator (the gal-per-1,000-sq-ft band and the "add concentrate to water" safety line).

Sources

Square Footage Calculator for Pest Spraying — precision pest control guide. DIY Pest Control. Retrieved Jun 20, 2026.
Precor IGR Concentrate. HowToPest. Retrieved Jun 20, 2026.
Insecticide Application Calculator. SprayCalc Pro. Retrieved Jun 20, 2026.

How we choose and check our formulas