Phosphine Fumigation Dose Calculator
Calculate the number of aluminium phosphide tablets needed to fumigate stored grain or a sealed space.
Aluminium phosphide is dosed at about 3 tablets (3 g each) per tonne of grain (or per ~28 m³ for space fumigation) under a gas-tight cover for 5–7 days. It is EXTREMELY toxic — fumigation must be done only by trained, licensed operators with proper sealing and safety; never in occupied buildings.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers, traders and warehouse keepers use the free Phosphine Fumigation Dose Calculator for an accurate answer in seconds — no formulas to remember, works offline at the store.
About Phosphine Fumigation Dose Calculator
Aluminium phosphide is the standard fumigant for stored-grain pests, and the dose is straightforward — about 3 tablets per tonne under a gas-tight cover for several days. This tool counts the tablets for your quantity. But the safety stakes are extreme: phosphine gas is lethal and there is no field antidote, so fumigation must be carried out only by trained, licensed operators with proper gas-tight sealing, warning signs and PPE, and never in or near occupied dwellings.
How to use Phosphine Fumigation Dose Calculator
- 1Enter your grain/store figures into the inputs.
- 2Read the headline result and the supporting breakdown.
- 3Apply the guidance in the note to your storage decisions.
Why use Phosphine Fumigation Dose Calculator?
- ✓Uses the standard, citable storage/drying formula
- ✓Clear inputs with sensible defaults
- ✓Instant result with the working shown
- ✓Free, fully in-browser and private
Frequently asked questions
How many phosphine tablets per tonne of grain?+
About 3 tablets (3 g each) per tonne of grain under a gas-tight cover for 5–7 days; space fumigation uses roughly 3 tablets per 28 m³. Always follow the specific product label and local rules.
Is grain fumigation safe to do myself?+
No — aluminium phosphide releases lethal phosphine gas with no field antidote. It must be handled only by trained, licensed fumigators with proper sealing, monitoring, warning signage and PPE, and never used in or beneath occupied buildings. Treat the dose figure as planning information, not a DIY licence.
Is this tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline at the store/godown and your data never leaves the device.
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