⚗️ MIXING CALCULATOR

Pesticide Mixing Calculator

Select your product, application type, and sprayer size. Get the exact amount of concentrate to measure — with step-by-step mixing instructions. All rates are based on published EPA-registered labels.

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Educational use only. Rates shown are derived from published EPA-registered product labels for general guidance. The product label in your hand is the legally binding document — it supersedes any information on this website. Always read your complete label before mixing or applying any pesticide. Some applications require a state pesticide applicator license. Full disclaimer →

⚗️ Calculate Your Mix

Step-by-Step Mixing Instructions

📐 Understanding the Label Math

Pesticide labels give a rate like "0.5 fl oz per gallon." Here's what that actually means and how to scale it up for any tank size:

Concentrate needed = Label rate (fl oz/gal) × Tank size (gallons) Example: Talstar P perimeter spray Label rate: 0.5 fl oz per gallon Tank size: 4 gallons ───────────────────────────────── 0.5 × 4 = 2.0 fl oz of Talstar P Then fill to 4 gallons with water
💡 Always add concentrate to water — never water to concentrate. Fill the tank halfway with water first, add the measured concentrate, then fill to final volume. This prevents foaming and ensures proper mixing.
💡 Wettable powders (WP) like Demon WP are sold in pre-measured packets. One packet = one gallon. For 4 gallons, use 4 packets. Mix the powder into a small amount of water to form a paste first, then add to the tank.
💡 "fl oz" means fluid ounces — a volume measure. Labels sometimes confuse this with weight ounces. For liquid concentrates, always use a measuring cup or graduated cylinder, not a kitchen scale.

Common Label Abbreviations

ECEmulsifiable Concentrate — liquid, mixes with water to form milky emulsion
SC / CSSuspension Concentrate / Capsule Suspension — tiny particles suspended in liquid
WPWettable Powder — dry powder that mixes with water; often sold in pre-measured packets
WDG / WGWater-Dispersible Granule — granules that dissolve when added to water
RTUReady to Use — pre-diluted, do not add water
REIRe-Entry Interval — minimum time before people/pets can re-enter treated area
PHIPre-Harvest Interval — days between application and harvest (agricultural)

📋 Label Rate Quick Reference

All rates below are from published EPA-registered labels. Rates reflect general/perimeter applications unless noted. Always consult your specific product label — rates vary by site, pest, and formulation lot.

Product (Active Ingredient) Conc. Use Rate per Gallon Per 4-Gal Backpack Notes
Talstar P / Bifen IT
bifenthrin 7.9%		 7.9% General perimeter 0.33–1 fl oz 1.3–4 fl oz Low rate for maintenance; high rate for heavy pressure
Talstar P / Bifen IT
bifenthrin 7.9%		 7.9% Mosquito/yard 0.5 fl oz 2 fl oz Apply to foliage; evening only (bee safety)
Demand CS / Cyzmic CS
lambda-CY 9.7%		 9.7% General perimeter 0.2–0.4 fl oz 0.8–1.6 fl oz Microencapsulation extends residual in heat
Suspend SC
deltamethrin 4.75%		 4.75% General/indoor 0.5–1.5 fl oz 2–6 fl oz Excellent indoor residual; low odor
Demon WP
cypermethrin 40%		 40% WP General perimeter 1 packet (9.5g) 4 packets Pre-measured packets; make paste in water first
Termidor SC / Taurus SC
fipronil 9.1%		 9.1% General pest (licensed) 0.4–0.8 fl oz 1.6–3.2 fl oz PRO LICENSE required in most states for termite use
Termidor SC / Taurus SC
fipronil 9.1%		 9.1% Termite soil trench 0.8 fl oz → 0.06% solution 4 gal per 10 linear ft PRO LICENSE Apply 4 gal per 10 linear ft per foot of depth
Dominion 2L
imidacloprid 21.4%		 21.4% Tree/shrub drench 0.1–0.2 fl oz per inch trunk diam. Varies by tree size Mix in 1 gal water per inch; apply to root zone
Dominion 2L
imidacloprid 21.4%		 21.4% Grub prevention (lawn) 0.9 fl oz per 1,000 sq ft In 1–2 gal water per 1,000 sq ft Apply June–July; water in immediately
Permethrin SFR
permethrin 36.8%		 36.8% Tick/mosquito yard 0.4 fl oz 1.6 fl oz ⚠️ FATAL TO CATS — keep cats off treated area until dry
Neem Oil (cold-pressed 100%) 100% Foliar pest/fungal 2 tbsp + 1 tsp dish soap 8 tbsp oil + 4 tsp soap Emulsify soap in water first; apply evening only
⚖️ Educational use only. Rates on this page are derived from published EPA-registered product labels for general reference. The label included with your specific product lot is the legally binding document under FIFRA (7 U.S.C. § 136). Some applications shown require a state pesticide applicator license — verify requirements with your state regulatory authority. Full disclaimer → | Pesticide Library →
Published: Jan 1, 2025 · Updated: Apr 7, 2026