Pesticide Dilution Calculator

How much pesticide per litre of water? Get the exact dilution for your sprayer tank. Use the free Pesticide Dilution Calculator below — enter your values and get instant results, right in your browser. Ml per litre = dose per acre (ml) ÷ water per acre (L). Ml per tank = ml per litre × tank size (L).

How to use the Pesticide Dilution Calculator

Pesticide labels give the dose per acre, but you mix it per sprayer tank — and guessing the dilution either wastes expensive chemical or leaves pests alive to build resistance. This pesticide dilution calculator divides the per-acre dose by the per-acre water volume to give millilitres per litre, then scales it to your exact tank size. Whether you carry a 16-litre knapsack or a 200-litre tractor tank, every fill is mixed precisely to the label rate.

  1. Enter the pesticide dose per acre in ml from the product label.
  2. Enter the spray water volume per acre in litres (often 100 L).
  3. Enter your sprayer tank size in litres.
  4. Click Calculate to see ml per litre and ml per tank.
  5. Measure with a proper cup — never guess or pour freehand.

Formula

Ml per litre = dose per acre (ml) ÷ water per acre (L). Ml per tank = ml per litre × tank size (L).

Worked example

Label dose 400 ml per acre in 100 litres of water: 4 ml per litre. For a 16-litre knapsack tank, mix 64 ml per fill — about 6.25 tanks cover the acre. Rinse the measuring cup into the tank so no chemical is wasted, and wash the sprayer after the job.

Frequently asked questions

Divide the per-acre dose by the per-acre water volume — e.g. 400 ml in 100 L = 4 ml per litre.

No — overdosing wastes money, risks crop damage and builds resistance. Spray on time instead.

About 100 litres per acre with a knapsack sprayer for field crops; follow the label for orchards.

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