🌱 Advanced NPK Calculator
Scientific Dosage & Cost Estimator
Step 1: Field & Crop
Recommended Nutrient Dose (Kg / Acre)
Step 2: Fertilizer & Add-ons
Required Fertilizer Dosage
Total Cost: ₹0
Urea (46% N)
0
0 Bags
1 Bag = 45 kg
DAP
0
0 Bags
1 Bag = 50 kg
MOP (60% K)
0
0 Bags
1 Bag = 50 kg
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Are you over-fertilizing or under-nourishing your crops? Precision farming starts with the right nutrients. Our free NPK Calculator helps you determine exactly how much fertilizer you need based on your soil test results and crop requirements. Save money on input costs and maximize your yield by applying exactly what your plants need—no more, no less.
How to Use This Calculator
Using the NPK calculator is simple. Follow these steps to get an accurate recommendation:
- Enter Plot Size: Input the size of your land (in acres, hectares, or square meters).
- Input Recommended Dose: Enter the N (Nitrogen), P (Phosphorus), and K (Potassium) requirements for your specific crop (usually found in your local agriculture handbook or KVK guidelines).
- Select Fertilizer: Choose the fertilizer you plan to use (e.g., Urea, DAP, MOP, or NPK 10-26-26).
- Calculate: Click the button to see the exact weight of fertilizer required for your field.
Understanding N-P-K: The Big Three
Every bag of fertilizer comes with three numbers (e.g., 19-19-19 or 46-0-0). These represent the percentage by weight of the three primary macronutrients:
- N – Nitrogen (Green Growth): Nitrogen is the engine of plant growth. It is responsible for the growth of leaves and stems and gives plants their vibrant green color.
- Deficiency: Yellowing leaves (chlorosis) and stunted growth.
- Common Sources: Urea (46% N), Ammonium Sulfate.
- P – Phosphorus (Root & Fruit): Phosphorus is vital for energy transfer within the plant. It promotes strong root development, flowering, and seed formation.
- Deficiency: Purple tints on leaves, poor root systems, and delayed maturity.
- Common Sources: SSP (Single Super Phosphate), DAP (Diammonium Phosphate).
- K – Potassium (Overall Health): Potassium is the “immune booster” for plants. It regulates water retention, improves drought resistance, and helps plants fight off diseases.
- Deficiency: Burnt edges on leaves (scorching) and weak stems.
- Common Sources: MOP (Muriate of Potash), SOP (Sulfate of Potash).
Why Use an NPK Calculator?
- Reduce Farming Costs: Fertilizers are one of the biggest expenses in agriculture. Many farmers apply ad-hoc amounts, leading to wastage. By calculating the exact dose, you stop buying unnecessary bags of fertilizer.
- Prevent Soil Degradation: Over-application of chemicals can alter soil pH and harm beneficial soil microbes. Precise calculation maintains soil health for future planting seasons.
- Maximize Yield: A balanced diet is as important for plants as it is for humans. Imbalanced nutrition (e.g., too much Nitrogen but low Potassium) can lead to weak plants that topple over or fail to fruit.