Pesticide Dilution Calculator
Scales a label dilution to the size of your sprayer. The label is the legal and safe rate, so take the rate from there.
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The formula
product per tank = label amount × tank volume ÷ label water volume ratio 1 : N, product = tank volume ÷ (N + 1)
A ratio of 1 to N is one part product in N + 1 parts of the finished mix.
What to watch out for
Never round up to use the bottle, and do not make more than you will use. Measure with a dedicated measuring jug. For a boom sprayer rate given per hectare or acre, use the spray tank mix calculator.
Frequently Asked Questions
What rate should I use?
The one on the label of your product, for your crop and target. No general figure is safe to use in its place.
How is a dilution scaled to my sprayer?
By proportion. As pure arithmetic, 10 mL per litre in a 16 L tank is 160 mL. Use your own label’s figure.