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
Worked Example
Foliar fertilizer at 2 L/ha dose, 200 L/ha spray volume, 400 L tank, 50 ha field
- 1. Calculate area per tank
400 L tank / 200 L/ha spray volume = 2 ha per tank load
- 2. Calculate product per tank
2 L/ha dose x 2 ha per tank = 4 L of product per tank load
- 3. Calculate tank loads needed
ceiling(50 ha / 2 ha per tank) = 25 tank loads
- 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
| Condition | What It Means |
|---|---|
| Tank loads round up | The 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 tank | If 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 needed | Consider 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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