Seed Treatment Calculator & Dose per kg of Seed
Doses fungicides
“One accepted answer here saves a hundred people an hour each.
Get the right seed-treatment dose — from your seed quantity (or seed rate × area) and the per-kg rate, the total product and the slurry water to coat the seed.
Enter your seed & dose
Next: treat the seed in a drum or seed-treater so every grain is coated, dry it in the shade (never direct sun), and sow the same day for the best protection.
Follow the product label dose; wear gloves & a mask.
Seed treatment — key facts
- Product
- seed kg × dose/kg
- Powder dose
- g per kg seed
- Liquid dose
- ml per kg seed
- Slurry water
- ≈ 5–15 ml/kg
- Method
- tumble-coat in a drum
- After treating
- dry in shade, sow same day
- Safety
- gloves & mask; never feed treated seed
- Privacy
- Runs in your browser; nothing uploaded
Protect the seed, protect the stand
Seed treatment is the cheapest crop protection there is: a few grams of fungicide, insecticide or beneficial microbe per kilogram of seed defends the germinating seed and seedling through their most vulnerable days, lifting emergence and cutting early disease. But the dose has to be right — too little fails to protect, too much can harm germination and wastes costly product.
This tool turns your seed quantity (entered directly, or as seed rate × area) and the label's per-kg dose into the exact total product and slurry water to prepare, in grams or millilitres, with cost. Coat the seed evenly in a drum, dry in the shade and sow the same day, and always handle treated seed with gloves and a mask. Pair it with the Seed Rate and Germination Test tools to plan sowing.
Dose it right
Exact product per seed lot — no guessing, no waste.
Mix the slurry
Get the water to make an even, well-sticking coating.
From seed or area
Enter seed weight directly or derive it from rate × area.
Budget the input
Add a price per g/ml to cost the treatment.
Frequently Asked Questions
How do I calculate a seed treatment dose?+
Multiply the seed weight by the per-kg dose on the label: product = seed (kg) × dose (g or ml per kg). To treat 100 kg of seed at 2 g/kg you need 200 g of product. This tool computes the total product and the slurry water from your seed quantity and dose.
What is seed treatment?+
Coating seed with a fungicide, insecticide, micronutrient or biological agent (like Trichoderma or Rhizobium) before sowing, to protect the seed and young seedling from soil- and seed-borne diseases and pests, and to boost establishment. It's a cheap, targeted form of crop protection.
Should I enter seed weight or area?+
Either. If you know the seed quantity, enter it directly. If you know your seed rate and area, switch to 'by area' and the tool first works out the seed weight (seed rate × area) before applying the dose. Both give the same product and water totals.
How much water do I add for wet treatment?+
Wet/slurry treatment typically uses a small amount of water to make a paste that sticks the product to the seed — often around 5–15 ml per kg of seed, per the product label. Enter the water per kg and the tool gives the total slurry water. Dry treatments need no water.
What's the difference between dry and wet treatment?+
Dry treatment dusts a powder onto dry seed in a drum; wet/slurry treatment mixes the product with a little water into a paste that coats the seed more evenly. Wet treatment usually gives better adhesion and coverage. Follow the product label for which method and dose to use.
Is seed treatment measured in grams or millilitres?+
Powders and water-dispersible products are dosed in grams per kg of seed; liquid formulations in millilitres per kg. The tool lets you pick g/kg or ml/kg so the total comes out in the right unit, and also converts to kg or litres for ordering.
How do I treat the seed evenly?+
Use a seed-treating drum or a clean container with a lid: add seed, add the measured product (and water for slurry), then tumble/rotate until every seed is uniformly coated. Dry treated seed in the shade and sow the same day where possible. Even coating is key to good protection.
Is treated seed safe to handle?+
Treated seed is coated with pesticide, so wear gloves and a mask, don't eat or feed treated seed to animals or people, label treated-seed bags clearly, and wash after handling. Follow all label safety directions. Never use leftover treated seed as food or feed.
Can I treat seed with bio-agents and inoculants?+
Yes — Trichoderma, Pseudomonas and Rhizobium/biofertilizer inoculants are applied as seed treatments too, usually as a slurry. The same dose-per-kg maths applies. Keep biologicals out of direct sun and don't mix them with chemical fungicides unless the label allows it.
How does this help my crop?+
Right-dosed seed treatment protects germinating seed and seedlings during their most vulnerable phase, improving emergence and stand, cutting early disease, and often raising yield — at a tiny fraction of the cost of foliar sprays. Getting the dose right (not over or under) is what this tool ensures.
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