Spray Mix Calculator

Take a number straight off the label — say 2 g/L — and get the product for one tank, one hectare and your whole plot. Chapters 10–11 cover when to spray; this tool only does the arithmetic.

How the spray-mix calculator's outputs relate to the label rateThe label rate branches into four outputs: multiplied by water volume per hectare it gives product per hectare; by plot size, the total for the plot; by dividing by tank size, the number of tanks; and multiplied directly by tank capacity, the product per tank.Label rate2 g/L off the labelPer hectarerate × water (L/ha)Total for plotper ha × plot sizeFull tankstotal ÷ tank size× water volume (L/ha)× plot size (ha)÷ tank capacityPer tankrate × tank (L)× tank capacity (L)Every output is the label rate multiplied by a volume — the tool assumes nothing else.
Four outputs, one label rate. If the arithmetic looks obvious it is because it is — the reason to hand it to a calculator is the unit mixing, not the multiplication.

Read this off the product label

L

Knapsack ≈ 15–20 L · power sprayer ≈ 400–800 L

L/ha

Typical 400–600 L/ha for ginger ground spray

1.00 ha = 2.47 acres

Product per tank—
Product per hectare—
Total for plot—
Full tanks needed—

The label is the law. This tool does arithmetic only — it does not choose products, set rates or grant permission. Always follow the label for rate range, pre-harvest interval (PHI), re-entry time and PPE, and confirm the product is registered for ginger in your jurisdiction. Export lots get residue-tested.