Irrigation & Nutrition

Nutrient Calculator

Nutrient formulation and dosing support for fertigation planning.

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What it does

A nutrient dosing tool with Calculator, Recipes, Growth Stages and Formulations tabs, built around custom nutrient recipes saved in the browser. It calculates fertilizer amounts for A/B stock tanks and exports a PDF report.

When to use it

Use it to turn a target nutrient recipe (ppm per element, EC and pH) into gram amounts of fertilizer salts for a given tank volume and concentration factor.

How it calculates

Fertilizer grams = needed ppm × tank volume ÷ (element % × 10), based on each fertilizer's main element
Ca, Mg and S already in the source water are subtracted from recipe targets
Fertilizers are split into Stock Tank A and B and checked for compatibility and solubility limits
Each element's achieved level is compared with its target (90–110% shown as in range)

What you enter

Recipe name, crop type and growth stage
Target EC(mS/cm)
Target pH
N, P, K(ppm)
Ca, Mg, S(ppm)
Fe, Mn, B, Zn, Cu, Mo(ppm)
Tank Volume(L)
Concentration Factor(1:X)
Water EC (mS/cm) and water pH
Water analysis: Ca, Mg, S, HCO₃, Na, Cl(ppm)

What you get

Fertilizer Amounts(g)
Stock tank A/B volume (L) and contents
Element Achievement(ppm vs. target)
Estimated EC(mS/cm)
Total cost and cost per liter($)
Compatibility warnings
Mixing Instructions

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