Fertilizer NPK Calculator

NPK numbers on a fertilizer bag represent the percentage by weight of nitrogen (N), phosphorus (P₂O₅), and potassium (K₂O). A 10-10-10 fertilizer contains 10% of each nutrient by weight.

N (Nitrogen) — promotes leafy, green growth
P (Phosphorus) — supports root development and flowering
K (Potassium) — improves disease resistance and fruit quality
The remaining percentage is filler (carrier material)