Fertilizer Requirement Calculator
NPK requirement and bags needed for your crop and field size.
🧮 Advanced Calculator
Basic math, %, margin, discount, wholesale, markup, tax.
🧾 VAT Calculator
Auto VAT rates for Ghana & Africa. Inclusive / exclusive.
💱 Currency Converter
Live rates: GHS, USD, EUR, GBP + major African currencies.
📏 Business Measurement
Length, area, weight, volume & construction calculators.
🚜 Farming Tools
Poultry, crop, livestock & farm business calculators.
🚜 Free Farming Tools
Poultry, crop, livestock and farm business calculators. Works offline once the app is installed.
Free Business & Farming Tool — share this calculator
🧪 Fertilizer Requirement
NPK, urea and MOP quantities in kg and 50 kg bags.
How this is calculated: A compound NPK 15-15-15 basal dose covers the limiting nutrient (rate ÷ 0.15). Remaining nitrogen is topped up with urea at 46% N and remaining potassium with muriate of potash at 60% K₂O. Bags are 50 kg, rounded up.
Sign in to save calculation history across devices. Results below can be shared or downloaded instantly.