NPK Ratio Calculator
Decode fertilizer NPK numbers and calculate actual nutrient amounts per application.
How It Works
Enter the three NPK numbers from your fertilizer bag and the amount you plan to apply. The calculator breaks down how many pounds of actual nitrogen, phosphorus, and potassium are in that application.
Formula
Actual Nutrient (lbs) = Fertilizer Weight (lbs) x (NPK% / 100)
Frequently Asked Questions
What do N, P, and K stand for?
N is Nitrogen which promotes leafy green growth. P is Phosphorus which supports root development and flowering. K is Potassium which improves overall plant health and disease resistance.
What is a balanced fertilizer?
A balanced fertilizer has equal percentages of N, P, and K such as 10-10-10 or 20-20-20. Balanced fertilizers are good for general use when you do not have a specific deficiency.