Spray Tank Mix Calculator: Product per Tank Load and Total Product Needed

Calculate exactly how much product to add per spray tank load and the total product needed for your field area. This tank mix calculator works for foliar fertilizers, growth regulators, micronutrients, and biostimulants. Enter your product dose, spray volume, tank size, and field area to get precise mixing instructions and tank load counts.

Inputs Explained

Product Dose
The recommended application rate per hectare or acre as specified on the product label. Enter in L/ha, mL/ha, gal/acre, or oz/acre depending on the product formulation.
Spray Volume
The amount of carrier water applied per hectare or acre. Typical values: 100-200 L/ha for boom sprayers, 300-600 L/ha for airblast sprayers.
Tank Size
The capacity of your spray tank in litres or gallons. This determines how much area each tank load covers and how much product to add per fill.
Field Area
Total area to be sprayed in hectares or acres. Used to calculate total product needed and number of tank loads required.

How This Calculator Works

Based on: Area per tank = Tank Size / Spray Volume; Product per tank = Product Dose x Area per tank
Best for: Foliar sprays, growth regulators, micronutrients, and biostimulant applications in crop planning
Check locally: Always verify product compatibility with a jar test before tank mixing multiple products
Units supported: Metric (L/ha, L tank), Imperial (gal/acre, gal tank)

Worked Example

Foliar fertilizer at 2 L/ha dose, 200 L/ha spray volume, 400 L tank, 50 ha field

  1. 1. Calculate area per tank

    400 L tank / 200 L/ha spray volume = 2 ha per tank load

  2. 2. Calculate product per tank

    2 L/ha dose x 2 ha per tank = 4 L of product per tank load

  3. 3. Calculate tank loads needed

    ceiling(50 ha / 2 ha per tank) = 25 tank loads

  4. 4. Calculate total product

    2 L/ha x 50 ha = 100 L total product needed

4 L product per tank load, 25 tank loads needed, 100 L total product for 50 ha

How to Interpret Your Results

ConditionWhat It Means
Tank loads round upThe calculator always rounds tank loads up (ceiling) so you never run short mid-field. The last tank may be partially filled.
Very low product per tankIf product per tank is extremely small, measure carefully with a graduated cylinder. Small dosing errors are amplified when product per tank is low.
Many tank loads neededConsider a larger tank or higher spray volume to reduce the number of refills and improve field efficiency.

Common Mistakes to Avoid

Using this calculator for registered pesticides

For registered pesticide applications, use the Spray Application Rate Calculator which includes safety flags and label rate compliance checks.

Mixing incompatible products without a jar test

Always perform a jar test when mixing multiple products. Some formulations separate, precipitate, or cause crop damage when combined.

Entering spray volume that does not match sprayer calibration

Calibrate your sprayer before the season. The calculator assumes you are actually applying the spray volume you enter.

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Frequently Asked Questions