Build precise nutrient mixes for healthy, vibrant gardens. See ppm instantly and avoid overdosing issues. Export CSV or PDF for quick sharing anytime easily.
| Nutrient | Source | Amount (g) | Nutrient (%) | Approx ppm |
|---|---|---|---|---|
| Fe | Iron chelate (Fe-EDTA 13%) | 2.00 | 13.0 | 13.0 |
| Mn | Manganese sulfate (~31.8% Mn) | 0.60 | 31.8 | 9.5 |
| B | Boric acid (~17.5% B) | 0.25 | 17.5 | 2.2 |
Direct to reservoir
Micronutrient grams = fertilizer grams × purity × nutrient percent.
ppm (mg/L) = micronutrient grams × 1000 ÷ final liters.
From stock dosing
Stock mg/L = micronutrient grams × 1000 ÷ stock liters.
Final ppm = stock mg/L × dose liters per liter.
Parts per million expresses micronutrient strength as milligrams per liter, making recipes comparable across tanks and irrigation events. Because 1 ppm equals 1 mg/L in water-based solutions, you can scale any recipe by volume. Using ppm helps you spot underfeeding, prevent toxicity, and communicate targets consistently with growers and clients.
The calculator converts fertilizer grams into elemental grams using the label percentage and an optional purity factor. Many products list elemental values, but some labels use oxide forms, so confirm you are entering elemental percent for Fe, Mn, Zn, Cu, B, or Mo. Final ppm depends on solution volume, so measure reservoir liters after topping up and mixing. If you blend multiple sources, totals are summed per nutrient.
Direct additions suit small batches, transplant drenches, and quick corrections when a deficiency appears. Stock solutions suit routine feeding because dosing stays consistent as volume changes and reduces daily weighing. In stock mode, the tool calculates stock concentration, then scales it by the dose rate in milliliters per liter. Label your stock, store it sealed, and remix before dosing.
Chelates keep iron and other metals available, but their nutrient percentage differs by chelate type, so confirm the value before mixing. Hydrated salts also vary by formula weight, so the same grams can deliver different elemental ppm across products. Dissolve salts fully in warm water, add acids separately, and avoid combining concentrated phosphates with calcium to reduce precipitation, emitter clogging, and micronutrient lockout.
After mixing, verify with pH and electrical conductivity, then adjust slowly. Use clean measuring tools, and consider a test jar for compatibility before treating a full tank. Save each run as CSV or PDF to document batches, troubleshoot growth issues, and standardize operations. Typical ranges vary by crop and water quality, so treat calculator outputs as a starting point and refine with tissue tests.
ppm equals mg/L of the elemental micronutrient in the final solution. The totals are grouped by nutrient (Fe, Mn, Zn, Cu, B, Mo) and summed across all entered sources.
Use the product label or technical sheet and enter the elemental percent by weight. If the label lists an oxide form, convert to elemental before entering, or use a trusted elemental specification.
Purity accounts for inactive material or nontechnical grades. If you do not know purity, keep it at 100%. Lower purity reduces the delivered elemental grams and therefore lowers the ppm result.
Use stock mode when you prepare a concentrate and inject or dose it at a fixed rate. The calculator converts the stock concentration to final ppm using your dosing rate in mL per liter.
No. It calculates what you mix, not what plants absorb. Water alkalinity, pH, interactions, and crop demand all matter. Use the results alongside water tests, tissue analysis, and observed plant response.
Weigh salts in grams with a precise scale, measure volumes in liters, and keep notes on product form. Mix thoroughly, verify pH and conductivity, and make adjustments in small steps.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.