Pesticide dosing calculators: dilution, coverage, and rate tools in one place

This page gathers the pesticide dosing calculators on Fieldwynn in one place, grouped by the kind of product you are planning: liquid sprays, granules, mosquito treatments, flea-and-tick mixes, and termiticides. Each one is free, runs in your browser, and does a single job — turning a label rate and a measurement into a quantity you can weigh or pour. Pick the calculator that matches your product below.

The free tools here come from the team building Fieldwynn, pre-launch field-service software for small crews — the next-step link at the end of this page points to its early-access waitlist. Read it as a recommendation with a funnel behind it, not a neutral verdict. The calculators themselves stay free permanently; they are arithmetic, and the section right below is honest about exactly where that arithmetic stops.

The calculators at a glance

Read this table by the product in your hand. The left column links to each tool; the other two say what you type in and what comes back, so you can jump straight to the one that fits the job.

Liquid sprays: dilution, coverage, and calibration

Most pesticide work is a liquid concentrate mixed with water and sprayed, so three tools do most of the lifting. The dilution and tank-mix calculator is the one to start with: type the rate as it appears on your label — whether that is ounces per gallon, a 1:X ratio, or a percent solution — and your tank size, and it returns how much concentrate and how much water to load, kept separate and in measurable shop units. Where the figure you are handed is a concentration rather than a ratio, the active ingredient converter moves between active-ingredient percent, finished percent, ounces per gallon and parts per million before any tank math starts.

Dilution tells you what one tank holds; coverage tells you how many tanks the whole job takes. The spray coverage calculator turns a treatment area and a per-1,000-square-foot or per-acre rate into the product to measure, the finished spray gallons, and the number of tank loads — concentrate and carrier reported separately. Both of those numbers assume your sprayer actually puts out what you think it does, which is rarely a safe assumption out of the box. The backpack sprayer calibration calculator measures your sprayer’s real output from a walked test strip and checks it against the target rate you enter, so the rest of the math rests on a figure you measured rather than one you assumed.

Granular products

Not everything goes in a tank. For products spread dry, the granular insecticide rate calculator takes an area and a label rate in pounds per 1,000 square feet and returns the pounds to load, the number of bags to buy, the leftover, and the material cost — in broadcast, coverage-per-bag, or perimeter-band modes. It is the granular counterpart to the spray coverage tool: same question (how much product, how many containers, what does it cost), different physical form. The reverse-verify half of that is the machine: the granular spreader calibration calculator works out what your spreader actually puts down over a measured pass, which is the figure the rate math assumes. Bait is the other dry-product case, and the ant bait placement and rate calculator handles it from the geometry you measured, turning linear feet of trail, a treatment area, or a foundation perimeter into gel placements, granular pounds, and containers to buy at the label rate you enter.

Mosquito control

Mosquito jobs split into two very different kinds of math. Adult barrier and ULV treatments are an acre-scale spray problem: the mosquito yard coverage calculator takes a yard area and a label rate and returns finished spray gallons, the concentrate to measure, and discrete fogger tank-fills with a per-tank load-out. Larval control of standing water is a surface-area problem instead: the mosquito larvicide dosage calculator takes the surface area of a pond or catch basin and returns whole or fractional dunks, a season-supply estimate, and a granular equivalent.

Whether a fogger is putting out the rate you think it is, is a separate measurement from either of those. The ULV fogger calibration calculator turns a timed catch at the nozzle, your ground speed, and your swath width into the fluid ounces per acre the machine is really applying, and checks that figure against the band your label allows, for a truck-mounted unit or a backpack. A permanent automatic system is laid out before any dosing question arises, nozzle by nozzle along the run, which is the job of the mosquito misting nozzle planner.

Flea and tick

A flea-and-tick yard treatment is usually a two-component mix — an insect growth regulator plus an adulticide — and getting both into the same finished gallons is where the arithmetic earns its keep. The flea and tick coverage calculator takes the treatment area in square feet and returns the finished gallons of mix to make and how much of each concentrate goes into every gallon.

Termite and soil treatments

Termite work has its own pair of tools because the geometry is unusual — long trenches and slab footprints rather than open turf. The termiticide concentrate yield calculator answers the supply question: how many finished gallons a bottle of concentrate makes, how far that trenches, and how many bottles or cases the job needs, from bottle ounces, dilution, and trench geometry. For new construction, the slab pre-treatment coverage calculator turns a slab footprint into the gallons of finished termiticide for the horizontal pre-pour barrier, with the coarse-fill bump that flat-area math leaves out, plus the concentrate and water split. Borates are the wood-applied side of the same trade and their rates are written per board foot or per square foot of wood surface, so the borate wood treatment coverage calculator takes framing, panels or a crawl space band and returns gallons of solution plus the Bora-Care concentrate or Tim-bor powder to weigh out at the coverage rate on your own label.

A printable reference for the truck

When you want the conversions on paper rather than a screen, the pesticide dilution and mixing chart prints common ratio-to-ounces-per-gallon conversions, a percent-solution strip, and small-batch fills for 32-ounce, 2.5-gallon, and backpack sprayers. It is a reference, not a calculator — the same conversions the dilution tool computes, in a form you can laminate and keep in the truck.

From the mix to the job

Once you know how much product a job consumes, you know its cost. The chemical cost per job calculator takes the quantities these dosing tools return and turns them into a per-job material cost, which is the floor underneath your gross margin — price below it and the visit loses money before labor and drive time are even counted. Pest work also tends to repeat, so the dosing math feeds a pricing question more than a one-off quote: the pest control pricing calculator compares one-time, quarterly, and monthly bond-plan tiers side by side, which is how recurring billing turns a single treatment into a book of business a buyer would one day pay you for.

Where this hub stops

This page is a map to the arithmetic, and the map ends at the same line every calculator on it observes: the math is ours to automate, the application is not. Use these tools to size a tank, check a sprayer, or cost a job; reach for the product label and your applicator license for anything about what to apply, at what rate, in what order, and how to do it safely. Two label facts sit around the mix rather than inside it: whether the product is a restricted use pesticide, which decides who may buy it and who may apply it, and the re-entry interval, which decides when the treated space can be occupied again. If you run a pest-control business and want the scheduling, recurring billing, and customer records behind these jobs in one place, the next step below points to the software we recommend for that — the calculators stay free either way.