Fertilizer amount·Calcium nitrate · 200 m²
Calcium nitrate
12.9 kg
200 m² · N 10 g/m²
Content 15.5%

Calcium nitrate on 200 m² — 12.9 kg for 10 g/m² of N

To put 10 g/m² of N on 200 m² with Calcium nitrate, spread 12.9 kg — that is 64.52 g per m². At 15.5% content it is simply the 2 kg of nutrient you need divided by that figure.

Fertilizer to spread

Urea is only 46% nitrogen, so putting 10 g of N down means spreading 10 ÷ 0.46 = 21.74 g of urea. Multiply instead and you get 4.6 g, a number that looks plausible enough to pass unnoticed. Whenever the content is below 100%, the fertilizer weight is always larger than the nutrient weight — that is the fastest check that you have the division the right way round.

  • N 5 g/m² · 32.26 g/m²6.45 kg
  • N 10 g/m² · 64.52 g/m²12.9 kg
  • N 15 g/m² · 96.77 g/m²19.35 kg
  • N 20 g/m² · 129.03 g/m²25.81 kg
Fertilizer
Calcium nitrate (15.5-0-0)
Area
200 m²
Nutrient matched
N
Content
15.5%
Nutrient needed
2 kg
Per m²
64.52 g

Nearby cells

Calcium nitrate
32.26 kgN 15.5%
Calcium nitrate
64.52 kgN 15.5%
Diammonium phosphate DAP
21.7 gP₂O₅ 46%
Diammonium phosphate DAP
108.7 gP₂O₅ 46%

Same fertilizer, other areas

1 m²
64.5 gN 15.5%
5 m²
322.6 gN 15.5%
10 m²
645.2 gN 15.5%
20 m²
1.29 kgN 15.5%
50 m²
3.23 kgN 15.5%
100 m²
6.45 kgN 15.5%
200 m²
12.9 kgN 15.5%
500 m²
32.26 kgN 15.5%
1000 m²
64.52 kgN 15.5%

Same area, other fertilizers

Urea
4.35 kgN 46%
Ammonium sulfate
9.52 kgN 21%
Ammonium nitrate
5.88 kgN 34%
Calcium nitrate
12.9 kgN 15.5%
Diammonium phosphate DAP
4.35 kgP₂O₅ 46%
Monoammonium phosphate MAP
3.85 kgP₂O₅ 52%
Triple superphosphate TSP
4.35 kgP₂O₅ 46%
Potassium chloride MOP
3.33 kgK₂O 60%
Potassium sulfate SOP
4 kgK₂O 50%
Potassium nitrate
4.35 kgK₂O 46%
Monopotassium phosphate MKP
3.85 kgP₂O₅ 52%
Compound NPK 21-17-17
9.52 kgN 21%
Compound NPK 17-21-17
9.52 kgP₂O₅ 21%
Compound NPK 20-20-20
10 kgN 20%
Compound NPK 10-10-10
20 kgN 10%

Worth knowing

  • Fertilizer to spread = nutrient needed ÷ (content ÷ 100). It is a division, never a multiplication.
  • Nutrient needed = area × target rate, so twice the area means twice the fertilizer.
  • A fertilizer with half the content takes twice as much for the same nutrient — inverse proportion.
  • With a compound, matching one nutrient drags the other two in at their content ratio.

Common questions

Q. How much Calcium nitrate goes on 200 m²?

At 10 g/m² of N, 12.9 kg — that is 64.52 g per m². It is the 2 kg of nutrient needed divided by the 15.5% content.

Q. If I double the target, do I double the fertilizer?

Yes. Target and fertilizer weight are directly proportional — 5 g/m² takes 6.45 kg and 20 g/m² takes 25.81 kg. Area behaves the same way: twice the area, twice the fertilizer.

Q. What else goes in along with it?

Calcium nitrate carries only N, so nothing else comes along. The other nutrients have to be supplied by separate fertilizers.