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Fertilizer Rate Calculator

Fertiliser rate per hectare for a nutrient target, with the total and cost.

Enter values

Results update as you type.

Result

Application rate

521.7 kg/ha

Total product needed
13.043 tonnes
Per application
173.9 kg/ha
Nutrient applied
4,500 kg
Per acre
211.1 kg/acre
600 kg bags
22
Total cost
$4,956.52
Cost per hectare
$198.26

About the Fertilizer Rate Calculator

Fertiliser rate per hectare for a nutrient target, with the total and cost.

Also known as: fertiliser per hectare, npk rate calculator, nitrogen rate, fertilizer application farming.

How to use this calculator

  1. Enter nutrient target, nutrient in the product, area, number of applications and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

rate = nutrient target ÷ nutrient percentage

Worked example

Using the values pre-filled in the calculator above:

  • Nutrient target = 180 kg N/ha
  • Nutrient in the product = 34.5 %
  • Area = 25 hectares
  • Number of applications = 3
  • Price per tonne = 380

the calculator returns:

  • Application rate: 521.7 kg/ha
  • Total product needed: 13.043 tonnes
  • Per application: 173.9 kg/ha
  • Nutrient applied: 4,500 kg