FREE · CALCULATORS & CONVERTERS
Fertilizer Calculator.
Find how much product a field needs from the bag analysis and the nutrient targets.
Targets are the nutrient rates you enter, not a soil recommendation. A nutrient with a target needs a non-zero analysis. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
- Governing nutrient
- N
- N product
- 266.666667 kg/ha
- Product rate
- 266.666667 kg/ha
- Product
- 266.666667 kg
- Bags
- 6
For each nutrient, product kilograms per hectare = target / (analysis percent / 100). The governing nutrient is the one that needs the most product. The analysis is the percentage printed on the bag.
How to use Fertilizer Calculator
Enter the product’s N, P₂O₅ and K₂O percentages and the kilograms per hectare you want of each. The nutrient that needs the most product governs the rate.
How it works
Find how much product a field needs from the bag analysis and the nutrient targets. Targets are the nutrient rates you enter, not a soil recommendation. A nutrient with a target needs a non-zero analysis. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
Example
A 15-15-15 product supplying 40 kg/ha of N.
Questions about Fertilizer Calculator
Is Fertilizer Calculator free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Targets are the nutrient rates you enter, not a soil recommendation. A nutrient with a target needs a non-zero analysis. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.