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Fertilizer dose calculator

Turn your soil test recommendation (kg of N, P and K per acre) into kilos and bags of urea, DAP or SSP, and MOP.

FertilizerTotalBags

Fertilizer bags: urea 45 kg, DAP, SSP and MOP 50 kg. Nutrient contents used: urea 46% N; DAP 18% N and 46% P2O5; SSP 16% P2O5; MOP 60% K2O.

How to use it

  1. Take the N, P2O5 and K2O recommendation from your soil test report or soil health card.
  2. Enter the amounts per acre and your area.
  3. Choose DAP or SSP for phosphorus. With DAP, the nitrogen it supplies is subtracted from the urea.

This calculator only converts nutrients into fertilizer weights. It does not decide how much your crop needs; that comes from a soil test and your crop stage. How to take a soil sample.

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