🧪 Fertilizer Calculator (NPK)

Calculate the exact NPK fertilizer requirements for your crops

Enter your crop details, area, and soil type to get precise fertilizer recommendations including Urea, SSP (Single Super Phosphate), and MOP (Muriate of Potash).

How It Works

This calculator provides fertilizer recommendations based on:

  • Crop-specific NPK requirements
  • Land area in acres
  • Soil fertility level

Formula: The calculator converts nutrient requirements (N, P, K) into actual fertilizer quantities using standard conversion ratios.

📝 Example Calculation

For 1 acre of Wheat in medium fertility soil:

  • Nitrogen: 120 kg (requires ~261 kg Urea)
  • Phosphorus: 60 kg (requires ~861 kg SSP)
  • Potassium: 40 kg (requires ~80 kg MOP)

❓ Frequently Asked Questions

When should I apply fertilizers?

Apply fertilizers in split doses: 50% at sowing/planting, 25% at vegetative stage, and 25% at flowering/grain filling stage.

What if I don't know my soil fertility?

Select "Medium Fertility" as a safe default. For accurate results, get a soil test done at your nearest agricultural office.

Can I use other fertilizers instead of Urea/SSP/MOP?

Yes, you can use alternatives like DAP, NPK complexes, or organic fertilizers. Adjust quantities based on their NPK content.

⚠️ Disclaimer

This calculator provides general recommendations. Actual requirements may vary based on soil test results, previous cropping history, and local conditions. Always consult with local agricultural experts for specific advice.