NPK PPM
Calculate nutrient contribution of fertilizer.
Verified ToolUpdated: January 10, 2026
Input Parameters
Calculated Result
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Nutrient PPM
Methodology & Sources
To define the PPM of a specific nutrient element contributed by a fertilizer, we take the mass of the fertilizer, multiply by the percentage of that element to get the mass of the element, and then divide by the volume of water.
The underlying formula used is:
(Weight (g) * Percent * 1000) / Volume (L)
References
- Hydroponics Society of America
Frequently Asked Questions
What is NPK?
NPK stands for Nitrogen (N), Phosphorus (P), and Potassium (K), the three macro-nutrients for plants.
Does this work for liquid fertilizers?
Yes, provided you know the equivalent weight or percentage by weight. Liquid labels often list NPK by weight/volume.
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