NPK Calculator
Calculate NPK fertilizer requirements for your field based on area and crop nutrient needs.
How to Use the NPK Calculator
- Enter the field area in m².
- Specify crop nitrogen, phosphorus, and potassium needs (g/m²).
- Enter the N, P, and K percentage content of your fertilizer.
- Click Calculate to get the required amounts.
Casos de Uso
- •Planning fertilizer application for fields.
- •Calculating nutrition for vegetable and fruit crops.
- •Optimizing mineral fertilizer costs.
- •Agronomic research and educational purposes.
Fórmula
Fertilizer amount = (nutrient need × area) / (nutrient content in fertilizer%). All three fractions are summed.
Perguntas Frequentes
What is NPK?
NPK stands for nitrogen (N), phosphorus (P), and potassium (K) — the three primary macronutrients for plant growth.
How do I determine nutrient rates?
Rates depend on the crop type and soil test results. Consult agronomic guidelines for your specific crop.
Can I apply all nutrients with one fertilizer?
Compound fertilizers contain all three elements, but the ratios may not match crop needs. This calculator handles separate application.