Dry Fertilizer Calculator

Calculate the NPKS of your custom fertilizer blend.

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Units:

Imperial (Tons) Metric (Tonnes)

Enter Your Field Size

acres

Pounds of sulphur required to come from ammonium sulphate?

lbs

Note: MAP + MST (Mono-Ammonium Phosphate + Micronized Sulfur Technology) integrates micronized elemental sulfur in MAP prills. In some cases it is still advised to apply a portion of S requirements from AMS (Ammonium Sulfate).

% of Urea:ESN

% Urea

% ESN

Enter the portion of your urea that you want to be applied as ESN. Note that the total amount of urea or ESN applied will first deduct the amount of incidental N applied form other fertilizers such as MAP or AMS.

Nutrient Requirement Detail

Nutrients Required/acre

P₂O₅

K₂O

S 0*

Actual Nutrients/acre

P₂O₅

K₂O

0** S

Guaranteed % Analysis

P₂O₅

K₂O

*S in this row is from AMS above: Not adjustable.
**S in this row is S from AMS plus elemental S from MST

Fertilizer Products (% analysis)

These fields are pre-populated with the most common fertilizer analysis. You may enter your own values or leave them as is.

Highlighted fields are required.

Urea

The guaranteed analysis is located on the product label. It is a listing of the percentage of each nutrient contained in the bag, by weight. Example for product containing just urea:
46-0-0, meaning it contains 46% nitrogen (N), 0% phosphate (P₂O₅), and 0% potash (K₂O).

P₂O₅

K₂O

$/Tonne

ESN

The guaranteed analysis is located on the product label. It is a listing of the percentage of each nutrient contained in the bag, by weight. Example for product containing just ESN:
44-0-0, meaning it contains 44% nitrogen (N), 0% phosphate (P₂O₅), and 0% potash (K₂O).

P₂O₅

K₂O

$/Tonne

Phosphorus Source

The guaranteed analysis is located on the product label. It is a listing of the percentage of each nutrient contained in the bag, by weight. Example for product containing just MAP+MST(or MAP):
9-43-0-16, meaning it contains 9% nitrogen (N), 43% phosphate (P₂O₅), 0% potash (K₂O), and 16% sulphur (S).

Please choose one:

MAP MAP+MST

P₂O₅

K₂O

$/Tonne

Potash

The guaranteed analysis is located on the product label. It is a listing of the percentage of each nutrient contained in the bag, by weight. Example for product containing just potash:
0-0-60, meaning it contains 0% nitrogen (N), 0% phosphate (P₂O₅), and 60% potash (K₂O).

P₂O₅

K₂O

$/Tonne

Ammonium Sulphate

The guaranteed analysis is located on the product label. It is a listing of the percentage of each nutrient contained in the bag, by weight. Example for product containing just ammonium sulphate:
20.5-0-0-24, meaning it contains 20.5% nitrogen (N), 0% phosphate (P₂O₅), 0% potash (K₂O), and 24% sulphur (S).

P₂O₅

K₂O

$/Tonne

Copper Fertilizer

The guaranteed analysis is located on the product label. It is a listing of the percentage of each nutrient contained in the bag, by weight. Example for product containing just copper:
0-0-0-3-5, meaning it contains 0% nitrogen (N), 0% phosphate (P₂O₅), 0% potash (K₂O), 3% sulphur (S), and 5% copper (Cu).

P₂O₅

K₂O

$/Tonne

Zinc Fertilizer

The guaranteed analysis is located on the product label. It is a listing of the percentage of each nutrient contained in the bag, by weight. Example for product containing just zinc:
0-0-0-7-0-7, meaning it contains 0% nitrogen (N), 0% phosphate (P₂O₅), 0% potash (K₂O), 7% sulphur (S), 0% copper (Cu), and 7% zinc (Zn).

P₂O₅

K₂O

$/Tonne

Blend Detail

Urea

0.00 lb/acre

0.00 % of Blend

0.00 Total Tonnes

ESN

0.00 lb/acre

0.00 % of Blend

0.00 Total Tonnes

MAP + MST

0.00 lb/acre

0.00 % of Blend

0.00 Total Tonnes

Potash

0.00 lb/acre

0.00 % of Blend

0.00 Total Tonnes

Ammonium Sulphate

0.00 lb/acre

0.00 % of Blend

0.00 Total Tonnes

Copper Fertilizer

0.00 lb/acre

0.00 % of Blend

0.00 Total Tonnes

Zinc Fertilizer

0.00 lb/acre

0.00 % of Blend

0.00 Total Tonnes

Your Field Information

Field Size (acre) 0

Sulphur from AMS (lbs) 0

% of Urea:ESN 0

Blend Summary

Rate per Acre (lb/acre) 0

Total Tonnes 0

Blend Cost Summary

Cost of Blend per Tonne 0

Cost of Blend per Acre 0

Total Cost 0

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