Spray & Tank Mix Calculator & Mix It Right, Every Tank
Mixes pesticides
“Ask in public — the answer helps everyone who lands here after you.
Turn a label dose into a foolproof mixing plan — total water and product for your area, the mix strength, the number of tank loads, and exactly how much product to add to each tank.
Enter your spray job
Next: half-fill the tank with water, add the measured product, top up with water and agitate. Calibrate your sprayer to actually deliver 200 L/ha. Wear gloves and a mask, and never exceed the label dose.
Always follow the product label — it is the legal authority on dose, water volume, safety and pre-harvest interval. This tool is a mixing aid only.
Spray mixing — key facts
- Total water
- spray volume (L/ha) × area
- Total product
- dose per ha × area
- Field spray volume
- ≈ 150–250 L/ha
- Knapsack tank
- ≈ 16 L
- Boom sprayer
- 400–600 L+
- Mixing order
- water → product → top up
- Authority
- always the product label
- Privacy
- Runs in your browser; nothing uploaded
How the tank mix is worked out
Two numbers drive the whole job: the spray volume (water per hectare) and the label dose. Multiply spray volume by your area for the total water, and the dose by your area for the total product — that fixes the mix concentration. The tool then divides the total water by your sprayer's tank size to count the loads, and multiplies the concentration by the tank size so every full tank gets the same correct amount of product. The last tank simply holds the leftover water at the same strength.
Mixing by tank rather than guessing keeps every load at the label rate, which matters in both directions: under-dosing lets pests and weeds survive and build resistance, while over-dosing wastes money, harms the crop and leaves illegal residues. Combined with a properly calibrated sprayer, this turns the label into an exact, repeatable plan — but the label always remains the legal authority on dose, water volume, safety gear and the pre-harvest interval.
Mix per tank
Get the exact product to add to each knapsack, power or boom tank — no more guesswork.
Any dose format
Enter the label rate per hectare or per litre; the tool handles liquids and powders alike.
Buy the right amount
See the total product the whole job needs so you purchase neither too little nor too much.
Spray accurately
Hit the label rate every load to control pests effectively and avoid residues and resistance.
Frequently Asked Questions
How do I calculate how much pesticide to mix?+
Decide your spray volume (litres of water per hectare) and read the label dose. Multiply the dose per hectare by your area for the total product, and the spray volume by your area for the total water. This tool does both, then divides the job into sprayer tank loads and tells you how much product to add to each tank.
What is spray volume and what should I use?+
Spray volume is the amount of water you apply per hectare to carry the chemical — commonly 150–250 L/ha for field crops with a boom, and more for dense or tall crops sprayed by knapsack. Always use the volume the label recommends and calibrate your sprayer to actually deliver it.
Dose per hectare or per litre — which do I enter?+
Use whichever the label gives. 'Per area' (e.g. 1 L/ha or 500 g/ha) is the dose for a hectare; 'per litre' (e.g. 2 mL/L or 1 g/L) is a concentration in the spray water. The tool accepts both and converts between them automatically.
How much product goes in each tank?+
The tool multiplies the mix concentration by your tank size, so every full tank gets the same measured amount of product. The final tank usually holds less water, but at the same concentration — fill it with the leftover water and a proportional dose.
How do I mix the tank safely?+
Half-fill the tank with clean water, add the measured product with the agitator running, then top up with water to the mark. Wear gloves, eye protection and a mask, mix in a ventilated area away from wells and waterways, and triple-rinse empty containers.
Can I use this for herbicides and fungicides too?+
Yes — the maths is the same for any liquid or powder applied by spray, including herbicides, fungicides, insecticides, micronutrient and foliar feeds. Just enter that product's label dose and unit.
Why must I calibrate my sprayer?+
The calculation assumes your sprayer actually applies the spray volume you entered. If nozzles are worn or your walking/driving speed differs, the real rate will be off. Calibrate by spraying a measured area with water and checking the volume used, then adjust.
What is the pre-harvest interval (PHI)?+
The pre-harvest interval is the minimum time that must pass between the last spray and harvest so residues fall to safe levels. It's on the label and is legally binding — this tool helps you mix correctly but never overrides the label's PHI, dose limits or safety directions.
How do I convert mL/L to a per-hectare dose?+
Multiply the concentration by your spray volume: 2 mL/L at 200 L/ha is 400 mL/ha. Switch the tool to 'per litre' mode and it shows the total and per-tank amounts directly, so you don't have to convert by hand.
Is it safe to tank-mix two products?+
Only if both labels permit it and they're physically compatible. Do a small jar test first, add products in the correct order (usually water-dispersible granules, then wettable powders, then liquids), and keep agitating. When in doubt, spray them separately.
Related farming tools
1900+ free tools, zero sign-up
Calculators, developer & SEO utilities, data, content, hardware and farming — all instant, private and in your browser.
Acreage
Open FarmingEquilibrium Moisture Content Calculator
Free equilibrium moisture content calculator. Grain settles to an equilibrium moisture content set by the stor
Open Dev & SEOREST Endpoint Visualizer
Paste an OpenAPI 3 spec and get a visual map of every endpoint: grouped by resource, with colour-coded HTTP me
Open NicheChurn Predictor
Predict probability-of-churn per cohort with a 5-axis at-risk radar (usage decline, NPS shift, billing failure
Open ContentImage to WBMP Converter
Convert images to WBMP, the lightweight one bit bitmap built for simple mobile displays.
Open HardwareSilicon Architecture Explorer
Explore CPU and GPU silicon: group every part by microarchitecture (Zen, Ada Lovelace, RDNA, Ampere, Blackwell
Open ProductivityPassword Strength Tester
Open ProSettings
Choose your theme, reading size, and script (Devanagari / IAST), and export, import, or clear your private pra
Open CalculatorAsphalt Calculator Results
Open FarmingEthylene Scrubber Sizing Calculator
Free ethylene scrubber sizing calculator. Enter your commodity, stored mass, store temperature, room volume an
Open Dev & SEOSchema Difference Analyzer
Paste two JSON Schema or OpenAPI schemas and get a real recursive structural diff framed as a compatibility an
Open NicheCohort Retention Heat-Grid Calculator
Visualise customer retention as a months-acquired × months-since-acquisition heat-grid. Surfaces cohort cliffs
Open ContentImage to WebP Converter
Convert images to WebP, Google's modern format for 25-35% smaller files at the same quality.
Open HardwareCPU GPU Compare Pro
Compare any two CPUs or GPUs side by side: metric-by-metric table with the winner highlighted, the performance
Open ProductivityPassword Tools
Test password strength against real standards (NIST 800-63B, OWASP ASVS), check against known breaches via k-a
Open ProInstagram Reel to SRT
Paste an Instagram Reel link and get accurate SRT subtitles in seconds. Free, no sign-up, runs in your browser
Open CalculatorAsphalt Sealer
Open FarmingEvaporative Cool Chamber Calculator
Free evaporative cool chamber calculator. Enter your produce load and crate size to get the chamber footprint,
Open Dev & SEOWebhook Documentation Generator
Define your webhook events and sample payloads, then generate complete documentation: an event catalog, an inf
Open NicheGross Margin Calculator
Decompose revenue into COGS line items and contribution margin with a donut visualisation. Slide price, volume
Open ContentBulk Image Converters — all formats
Browse every image conversion: JPG to PNG, PNG to WebP, HEIC to JPG, image to PDF, SVG and more.
Open HardwareHardware Benchmark Database Pro
Searchable, sortable CPU and GPU database: normalized performance index, perf-per-dollar and perf-per-watt, ti
Open ProWhich LLM Can My PC Run?
Free local LLM advisor: auto-detects your GPU, VRAM and RAM, then shows the exact models you can run — with re
Open Calculator