Fertigation Calculators
Formulate blends and convert element PPM into salt grams and conductivity — for drip systems, stock tanks and hydroponic reservoirs.
Blend
Formulate multi-nutrient dry and liquid N-P-K-S blends with carrier rates, costing and multi-element credits.
Open calculatorPPM → EC
Element PPM in to salt grams and EC out for hydroponic reservoirs, with supplied-element tracking.
Open calculatorFrom element PPM to a real tank
Recipes are usually written as element PPM — 100 ppm nitrogen, 40 ppm phosphorus — but product is weighed as salt. The PPM → EC calculator walks each target element through its source salts, sums the grams per litre, and estimates the resulting conductivity, tracking which elements each salt actually supplies.
Why generic blend calculators fall short
Materials carry analysis, density and solubility limits at the same time. A carrier or filler rate that looks fine on paper can push the total spread rate past what a spinner spreader will lay evenly, or exceed solubility in a stock tank. The Fertilizer Blend tool checks both, credits nutrients already supplied by other materials, and reports the blend against AAPFCO grade conventions.
Start from the soil, not the tank
Fertigation corrects what the soil can already hold. The 6 soil chemistry calculators cover the foundation — lime, pH, CEC, base saturation, gypsum and water quality: Lime Rate, pH Down, CEC, Base Saturation, Gypsum, SAR / CROSS.