Water Soluble Fertilizer Calculator

Find fertilizer grams for a target ppm in water.

Fertilizer needed 2.839

Formula: grams = ppm × liters ÷ 1000 ÷ (N%/100)

Step-by-step with your numbers:

1. Values used:

2. Target N = 150 ppm

3. Fertilizer N = 20 %

4. Water volume = 1

6. Fertilizer needed = 2.839

Did we solve your problem today?

Mix a precise nutrient solution at a target ppm of nitrogen.

The math behind it

ppm = mg/L. grams = ppm × liters ÷ 1000, divided by the fertilizer's N fraction.

150 ppm N in 1 gal with 20-N fertilizer → ~2.84 g.

EC/PPM meters?

Use one to verify your mixed solution's strength.