Fertilizer Calculator
Calculate fertilizer amount from N-P-K ratio. Free, instant.
How to Use Fertilizer Calculator
1
Enter area.
2
Enter nitrogen needed per 1000 sqft.
3
Enter fertilizer N percentage.
Frequently Asked Questions
What does N-P-K mean?
Nitrogen-Phosphorus-Potassium percentage by weight. 10-10-10 has 10% of each.